A range of sequentially numbered banknotes would appeal to a niche group of banknote collectors.
Presumably, they are all uncirculated and in mint condition.
You do not give any detail about the notes like serial numbers or signatories.
At the very worst, they are worth $70 AUD, but in reality, quite a lot more.
A reputable coin dealer will be able to provide a valuation based on inspection of the notes.
There were no 1968 Australian Five Dollar notes printed.
There were no Australian Fifty Dollar notes printed in 1984.
You do not give any detail to identify the notes. Presumably they are in mint or uncirculated condition. A group of sequentially numbered notes would have some value above that of the same number of non-sequentially numbered notes.
There were no 2003 Australian Ten Dollar star notes issued.
The last Australian One Dollar notes were printed in 1982.
There were no Australian banknotes of any type until 1913. The first Dollar notes were issued in February, 1966, at the conversion to decimal currency.
Uncut notes are packaged and issued for a specific niche of the collector market. If what you have is genuine, you may have something of value. However, the last Australian One Dollar notes were issued in 1982, and there are no documented issues of uncut Australian One Dollar notes in any year. A reputable coin dealer will be able to assist with a positive identification and give a valuation.
There were no Australian 10 Shilling notes printed in 1966. 1966 is the year they were withdrawn after being replaced by the One Dollar note.
The last Australian One Dollar notes were printed in 1982. An Australian One Dollar note (Johnston/Stone)(serial DGJ to DPS), uncirculated and in absolute mint condition could fetch up to $7 AUD. If it has been circulated but still in good condition, it might fetch anything from $1 to $3 AUD. Three consecutively numbered notes are likely to fetch a higher value. A reputable coin dealer will be able to give a more accurate valuation.
Assuming they are nice crisp uncirculated notes, about $1,000 for the set.
There are no general-issue Australian $50 notes dated 2008 that have any value above their face value. There is a very small market for notes that are in perfect (UNC) condition, however that is rather limited at present. The only other notes that will fetch a premium over face value are those with unusual serial numbers such as 999999 - notes like this are scarce, but not particularly rare.
The first Australian Dollar coin was issued in 1984.