Who raises the price of coins? Simple answer--the free market. Supply and demand. If buyers don't buy, sellers have to adjust prices accordingly, unless they want to be stuck with inventory. That is how our system works.
I would change that sentence if it were me. In general, the prices of US coins has been inflated for some time. But they are currently deflating, going down - not up.
I agree. The recent coin expo here, last weekend, a number of dealers had reduced prices on some of their inventory to recoup their investment, a lot has to do with the economy being so bad and no one buying at the higher prices. Tracking some sales completed on eBay shows many slabbed coins selling for upwards of $100 under the respective TPG's price guide lists the value at. But in the same respect, they're not buying much either, because most of what's being brought in is common stuff in common grades which they have a number of and are trying to sell off. There's also a smaller number of dealers coming to the bi-monthly expos because their sales are not what they were over a year and a half ago. They're now committing only to the annual show in the fall.