Post from the Pepsiman thread:
Is it because the demand is huge but the game hasn't so much copies for sale in order to satisfy everyone and so the sellers are taking advantage of this situation? It's like these games didn't released many copies when they first came out at the market. For example, as I can remember Panzer Dragoon Saga was one of the most popular games for Saturn like Nights into Dreams and Sega Rally when it first came so you would expect to find it easily and cheap years after. Yet it's considered as a holy grail for collectors while on the other hand you can find Nights into Dreams for a few dollars only. So what does it make it a holy grail? And which conditions make a game to be called holy grail?
Moreover, I have noticed this: some games even thought they are higly acclaimed weren't so much popular when they first released so they didn't sold well. So you would expect to find many unsold copies to buy one for a low price. Yet when this game get its attention it deserved years later the price rise like it was something rare. An example like that is Shantae for Gameboy Color. And speaking for rare, I hate when some sellers put the tag "very rare" even if it's not in order to sell them expensive.