If you have an annual 1973 uncirculated annual mint set, its worth is: $25-$30.00.
The coin is still in circulation today and has face value only
A very common coin still in circulation, it's face value.
1st Varient 38c (Combat) 3.5in barrel 95%=$75 (1964-1973)
This year is still in circulation and is only face value.
It's still worth 5 cents.
It's still worth 25 cents in Canada.
100-600 usd
The only 1973 dimes to carry an S mint mark were made for sale in proof sets, so if your coin has that letter on it, it's from a proof set that someone broke up and spent. The fact that it was put into circulation destroyed any extra value it had as a proof coin but you haven't lost much because it was only worth maybe 45 or 50 cents before someone took it out of its original Mint packaging. In any case it's an interesting curiosity to hold onto.
800-1000 USD
The "Plikten framfor allt" 1973 coin from Sweden is worth its face value, which is 5 kronor. These coins are still used in circulation and do not have a higher collector's value beyond their denomination.
Such a coin does not exist, the Royal Australian Mint did not produce any commemorative coins in 1973. You may have a souvenir token or medallion which would have been sold at the opening in 1973. In mint condition, it might get a dollar or two. Alternatively, you may have a 1997 pure silver "Landmark series" Ten Dollar coin which, in mint condition and the original packaging, could fetch up to $99.00 AUD. A reputable coin dealer will be able to give a more accurate valuation.
Assuming you refer to the Franklin Mint boxed set of 50 silver ingots depicting British Monarchs from 973 to 1973, starting prices on the internet commence at around £600 and go up to £5,000 GBP. Value would depend on the condition of the ingots, the packaging and the inclusion of the Certificate of Authenticity.