Prices could be due to the costs rising overseas. I have heard many companies had to increase costs because the cost of manufacturing rose overseas due to less orders coming in because of the economy still.
So increasing the price dramatically would change that though? it would make it worse. If people werent buying before, why would they buy now with an even higher price? It was not a smart move for SS to make a piece with a highly detailed and large base like this. The general Collectors dont want that if its gonna cost them an extra $100. I dont understand why they decided to take it easy with the Venom and Carnage bases, then go all out on Spidey, making a more popular character less affordable to collectors that have been waiting for this piece.