Not much I'm afraid. I'd say a few pence to a pound or so. Elizabeth II pre-decimal coins with the exception of a few are all very common and have little collector demand.
An Australian 1959 bronze Penny (Elizabeth II)(minted in Melbourne), uncirculated and in absolute mint condition could fetch up to $160 AUD. If it has been circulated but still in good condition, it might fetch anything from $1 to $30 AUD. There were 1.617 million minted. An Australian 1959 bronze Penny (Elizabeth II)(minted in Perth), uncirculated and in absolute mint condition could fetch up to $22 AUD. If it has been circulated but still in good condition, it might fetch anything from $0.50 to $3 AUD. There were 14.428 million minted. An Australian 1959 bronze Penny (Elizabeth II)(minted in Melbourne) (Proof), could fetch up to $1,575 AUD. There were 1,506 minted. An Australian 1959 bronze Penny (Elizabeth II)(minted in Melbourne) (Unique Proof - struck in silver), could fetch up to $25,000 AUD. An Australian 1959 bronze Penny (QE II)(minted in Perth) (Proof), could fetch up to $1,400 AUD. There were 1,030 minted. A reputable coin dealer will be able to give a more accurate valuation.
These coins are still potentially in circulation so, unless they are part of a Proof or Uncirculated mint set or are individual Proof or Uncirculated coins and in absolute mint condition, they are worth 1 Penny. A British 1971 bronze 1 New Penny coin (Elizabeth II), uncirculated and in absolute mint condition could fetch up to £0.10 GBP. A British 1971 bronze 1 New Penny coin (Elizabeth II)(Proof FDC), could fetch up to £1 GBP. A reputable coin dealer will be able to give a more accurate valuation.
Yes
An Australian 1955 bronze Penny (Elizabeth II)(minted in Melbourne - no mintmark), uncirculated and in absolute mint condition could fetch up to $50 AUD. If it has been circulated but still in good condition, it might fetch anything from $0.75 to $8 AUD. There were 6.936 million minted. An Australian 1955 bronze Penny (Elizabeth II)(minted in Perth - mintmark = Y.), uncirculated and in absolute mint condition could fetch up to $65 AUD. If it has been circulated but still in good condition, it might fetch anything from $0.75 to $7 AUD. There were 6.202 million minted. An Australian 1955 bronze Penny (Elizabeth II)(minted in Melbourne - no mintmark)(Proof), could fetch up to $1,100 AUD. There were 1,200 minted. An Australian 1955 bronze Penny (Elizabeth II)(minted in Perth - mintmark = Y.)(Proof), could fetch up to $10,500 AUD. There were 301 minted. A reputable coin dealer will be able to give a more accurate valuation.
An Australian 1953 bronze Penny (Elizabeth II)(minted in Melbourne - no mintmark), uncirculated and in absolute mint condition could fetch up to $60 AUD. If it has been circulated but still in good condition, it might fetch anything from $0.50 to $12 AUD. There were 6.936 million minted. An Australian 1953 bronze Penny (Elizabeth II)(minted in Perth - A.), uncirculated and in absolute mint condition could fetch up to $60 AUD. If it has been circulated but still in good condition, it might fetch anything from $0.50 to $12 AUD. There were 6.202 million minted. A reputable coin dealer will be able to give a more accurate valuation.
An Australian 1949 bronze Penny (George VI), uncirculated and in absolute mint condition could fetch up to $50 AUD. If it has been circulated but still in good condition, it might fetch anything from $0.75 to $12 AUD. There were 21.412 million minted. A reputable coin dealer will be able to give a more accurate valuation.
The decimal New Half Penny and Half Penny coins were last issued for circulation in 1983 and were withdrawn from circulation and demonetised in December 1984. So, unless they are part of a Proof or uncirculated mint set or are individual Proof or uncirculated coins and in absolute mint condition, they have little or no value. A British 1979 bronze Half New Penny coin (Elizabeth II), uncirculated and in absolute mint condition could fetch up to £0.10 GBP. A British 1979 bronze Half New Penny coin (Elizabeth II)(Proof FDC), could fetch up to £1 GBP. A reputable coin dealer will be able to give a more accurate valuation.
The decimal New Half Penny and Half Penny coins were last issued for circulation in 1983 and were withdrawn from circulation and demonetised in December 1984. So, unless they are part of a Proof or uncirculated mint set or are individual Proof or uncirculated coins and in absolute mint condition, they have little or no value. A British 1981 bronze Half New Penny (Elizabeth II), uncirculated and in absolute mint condition could fetch up to £0.20 GBP. A British 1981 bronze Half New Penny (Elizabeth II)(Proof FDC), uncirculated and in absolute mint condition could fetch up to £1 GBP. A reputable coin dealer will be able to give a more accurate valuation.
The decimal Half New Penny and Half Penny coins were last issued for circulation in 1983 and were withdrawn from circulation and demonetised in December 1984. So, unless they are part of a Proof or uncirculated mint set or are individual Proof or uncirculated coins and in absolute mint condition, they have little or no value. A British 1971 bronze Half New Penny coin (Elizabeth II), uncirculated and in absolute mint condition could fetch up to £0.10 GBP. A British 1971 bronze Half New Penny coin (Elizabeth II)(Proof FDC), could fetch up to £1 GBP. The values quoted are the best possible for the best specimens in their grades, but may be significantly lower due to varying demand for the coin and the prevailing economic climate. A reputable coin dealer will be able to give a more accurate valuation based on inspection of the coin.
The decimal New Half Penny and Half Penny coins were last issued for circulation in 1983 and were withdrawn from circulation and demonetised in December 1984. So, unless they are part of a Proof or uncirculated mint set or are individual Proof or uncirculated coins and in absolute mint condition, they have little or no value. The 1984 Half Penny was only issued as part of a Royal Mint Uncirculated or Proof set. A British 1984 bronze Half Penny coin (Elizabeth II), uncirculated and in absolute mint condition could fetch up to £2 GBP. A British 1984 bronze Half Penny coin (Elizabeth II)(Proof), uncirculated and in absolute mint condition could fetch up to £2 GBP. A reputable coin dealer will be able to give a more accurate valuation.
These coins are still potentially in circulation so, unless they are part of a Proof or Uncirculated mint set or are individual Proof or Uncirculated coins and in absolute mint condition, they are worth 1 Penny. A British 1984 bronze Penny (Elizabeth II), uncirculated and in absolute mint condition could fetch up to £1 GBP. A British 1984 bronze Penny (Elizabeth II)(Proof FDC), uncirculated and in absolute mint condition could fetch up to £1 GBP. The values quoted are the best possible for the best specimens in their grades, but may be significantly lower due to varying demand for the coin and the prevailing economic climate. A reputable coin dealer will be able to give a more accurate valuation based on inspection of the coin.
An Australian 1963 bronze Penny (Elizabeth II), uncirculated and in absolute mint condition could fetch up to $12 AUD. If it has been circulated but still in good condition, it might fetch anything from $0.50 to $3 AUD. There were 10.258 million minted. An Australian 1963 bronze Penny (Elizabeth II)(Proof), could fetch up to $1,475 AUD. There were 1,100 minted. A reputable coin dealer will be able to give a more accurate valuation.