In Collecting

Are kepign old NES Games a good thing profit wise, I know there must be ppl out there that pay alot for the classics but at the same time i went to trade in Duckhunt at game stop and got a nickel for it

When it comes to the value of any video game (or anything in general) the price is determined by how many copies are available and how many people want it (supply and demand). With Duckhunt, it's a classic game that any NES collecter would want but as part of Mario/Duckhunt it's the most easy to find game out there so I'm afraid you won't be making your millions on it. The only way to make a profit in used video games is to know what games will fetch a fortune on Ebay and then keep an eye open at garage sales and places like that to see if they are being sold for way less than they are worth. Best thing though is just to enjoy your games.

We already had the Duckhunt problem several times in the forum.
Some people seem to own dozens of it, that's why you can't get anything for it.