If the dust jacket doesn't have a price, it's probably a book club edition. Not all BMOC editions state that they are Book Club editions.
Doubleday ran out of "regular" trade editions and put a sticker on the dust jacket of some book club Salem's Lot editions and distributed them as trade editions. They aren't as valuable as the "regular" trade, but they are more valuable than the BMOC ones, even though they don't say First Edition on the CP.
John