What I've noticed here, in my short time, is the Buy/Sell/Trade is heavily weighted towards the WTB over the WTS. Has it always been this way? It seems like every WTS post is gone in seconds, and few people even HAVE the items extra to sell to people WTB.
Welcome to 2008. That's because there's an endless line of freemarket noobs like you who all need to have complete sets.
Shockman is rare enough to give noobs hard-ons, especially if a couple months have gone by since the last auction and they think they've found a copy with a jewel case.
I disagree with Shockman being even remotely rare. Shockman is not a rare title. Before I create the raffle I had 3 copies! I still have 2 copies!
I'm not saying it's rare, just that it's rare enough for bidding wars like this. Again, consider the other Turbochips from '92-93 that occasionally break $100: Soldier Blade, Legend of Hero Tonma, Bomberman '93, Neutopia 2... heck, people pay $100 for World Sports Competition. And not because they want to play it, but because they NEED it for their Precious.
So when a young Millennial suddenly decides he can't live without a complete set of some Gen X'er toy that launched when he was in diapers and searches for "shockman" and sees only one auction and two gouger listings, he'll do stupid things. Right now there's one gouger selling a new one for $255 and there's a BIN with manual for $150. When impatient people who believe ebay is a priceguide see numbers like that, they start to think $105 is a reasonable bid for an auction.