These are worth ONLY WHAT SOMEONE IS WILLING TO PAY. Start your bidding off at $5 and see what happens from there. When they say 100 sets you really don't know if its true. There is no way to verify that. All these private mint/coin companies make millions of these and they really dont have a numismatics value.
They have the list of all (?) such items on this page, but they don't give any value.
I agree that they're probably worth very little ─ though perhaps the plated varieties, such as yours, carry a small premium. I'm sure you should be able to find examples on eBay or other online coin dealers.
Like Aaron says, the value is what someone is willing to pay for it. But there also exist catalogs for these type of coins. Catalog prices are always just an indication of the value, certainly for these kind of coins with lesser collectors, so for what it's worth, here is the info about these coins in "The Standard Catalogue of Canadian Municipal Trade Tokens & Notes, page 10-7" by Serge Pelletier (unfortunately I only have the 15th edition, 1993 so it's a bit outdated).
Summerside has a population of 7,800 (around 1993) so these coins weren't certainly struck in the millions like Aaron suggested so let's assume the mintage in the catalog is correct.
There are 3 compositions for the PE17 (PE = Prince Edward Island), the 1982 Anne dollar with on the obverse the Greater Summerside Chamber of Commerce's Logo and on the reverse the bust of Anne of Green Gables:
- Nickel-Bonded-Steel (NBS) with a mintage of 15,000 and a value of 4.00 CAD
- Rhodium Plated (RhP) with a mintage of 100 and a value of 22.50 CAD
- Gold Plated (AuP) with a mintage of 100 and a value of 22.50 CAD
These were of course the catalog prices in 1993, but I guess your coins are more worth than you think. You only have to find someone who is willing to pay these prices.
