Longest you've seen a decent/uncommon game sit?

[bangtango]

This isn't the best title in the world so I'll try to explain it below.

There is a Goodwill near one of my jobs which has a glass case full of NES games. They are priced at $4 each, which is a little high for some people. As a result, the majority of the games have been sitting there for around 6 weeks now. Pretty much all of the games are either extremely common or they are bad games, some of them would be both.

One of the games that has been there for 6 weeks, though, is the first Metal Gear. Both the online rarity guide and recent Ebay auctions have a price similar to what my local Goodwill marked it. Still, I find it hard to believe that somebody hasn't bothered grabbing that copy of Metal Gear for $4 and it has been sitting there for 6 weeks. Between the novice Ebay sellers and "old school" NES fans out there, it doesn't make much sense that nobody has bothered to buy it after all this time. It seems like the perfect game for an Ebay seller with about 20 feedback who doesn't know a thing about NES collecting to grab, hoping to make a profit online.

To me, $4 seems like a "fair" price and I may actually grab the game tomorrow afternoon, if it is still there and it is a pretty good bet it will be. I've actually seen a half dozen people looking at the pile of NES games in that case, including Metal Gear.

So I'd like your answers. I'll try to phrase this question the best that I can. There is a little catch, which I'll put after the question.

What is the longest that you've seen a decent/uncommon game sitting around in a thrift store or at a flea market? What was the game?

Optional: Is it STILL there today? Why didn't you grab it?

Here is the catch, rather TWO fairly important catches.

1. The game has to be "around market value" or less. There have been a lot of threads about $15 NES games sitting at the same flea market for 5 years. That isn't a major surprise. You have to name a game which is (or was) being sold somewhere for a "fair" price or even an outright steal.

2. It has to be a game that there is a little demand for, though anyone who responds may have a different definition of what games would measure up. To me, Metal Gear is a game you should always be able to find a buyer for, assuming the price is good (and I think $4 isn't too much to ask). In short, something like Sega Genesis sports games or Mario/Duck Hunt wouldn't really count. I've seen them priced at 25-50 cents and sit on a rack for weeks, even though it is "technically" a reasonable price for those games.

Extras: It doesn't matter what system, either. Some people may want to go back a few months/years, in case they and lots of other "shoppers" continually passed up a game that was later proven to have high value or rarity.