I've dealt with them before myself. The prices are outrageous, except for the self-published and titles they purchased to publish, like Iron Soldier 2. They are better for picking up the titles that weren't available to the mass market, like the odd Jaguar, Nuon, or classic system games. Otherwise, the prices for the more 'common' collectibles just aren't worth it.
Reputable site. They aren't crooks, just pricey. Then again, if it is something you've been looking for for a long time, is the price worth too much?