Ok all pet stores here in Ottawa, have some sort of return policy. Petsmart is 2 weeks, Big Al's is 7 days but they will only give you 3% of what is was worth, Little critters has 2 weeks but its fish for fish trade, Crittle Jungle I beleive is 2 weeks aswel. All places do not give money back all instore credit which is good aswel.
I want to open a fish store that allowes trade ins all the time regardless of anything except sickness. A place if your looking for a larger fish you can find it, of any species. A place were we can give top dollar to anyone. 3% is nothing it kind of makes me never return fish to them, but it is a great place to shop due to the fish being very healthy, I have never lost a fish bought from Big Al's.
If I wanted to find a 18" pleco I can't find any that big at any pet store, but at my petstore 18" would be normal, 5 lb Oscars, 4 lbs Pirrana, 2' goldfish what ever anyone wants that is big. The way I would get them is advertize the we take in Big fish, trades, or whatever. Making it worth their while to come in and trade to something they might have wanted for a while.
Just an idea right now.....