jar155 and SC are right on the money.
Route & On-Location "Red Suit" Spider-Mans go for around $3700. "Black Suit" Collector's Edition Spider-Man goes for more nowadays. The better condition game (Red or Black Suit), the higher the price...aka Home Use Only Spider-Mans [HUO].
New In Box Spider-Mans [NIB] are still out there. They haven't been producing them for a while now, so expect to pay for that premium (up towards $6000-7000 for one of those).