[quote name='aniousjoe']Your personal opinion on a game does not dictate a value, period. Someone could say MUSHA is a piece of junk, and what does that do to it's value?
Completeness is an issue, and you have to look at similar completed auctions to get a general value, because obviously no person or site or resource can tell you what the difference is between most items with a scratch present or a manual missing. You have to make an educated guess. CAG, Amazon, and any other site vary differently in what a game will command for sale. Atariage, Nintendoage, and other forums will get you more money for specific items than other places, but it's not hard to figure it out. Lowballs will easily tip you off. Amazon and Ebay are the same way. An item can sell on Amazon for X amount of price because it's the only copy available, while on Ebay it'll sell for X-Y because there's more available.
Price guides are gauges. You, with your "knowledge", are no different.[/QUOTE]
Ah, but the opinion of gamers as a whole does dictate sales ranking. For a game like Smash Bros 64 it is popular enough to fly out the door; it can be a scuffed up cartridge, condition hardly matters. D on the other hand is less sought after, meaning collectors can hold back their $15-20 for Like New and Gem Mint copies only. Perhaps the higher bids gravitate towards the Longbox version only, or come from "Worldwide" buyers only.
Anyhow, we're getting off target here; the point isn't the value of the game to everyone in the ether but whether Readthepost can make the flip in his world. Going by my (worthless to be sure) experience of aggressive buying, $10 sunk into Smash Bros 64 will get you results whereas $10 in D will get you a headache. Don't take my word for it though...by all means, seek out lots which have these games and try it for yourself.