I wouldn't use Cap 1 as a barometer. It's probably the most common big key, alongside Bat 1. There is usually at least one copy in both HA and CC auctions each quarter, and often more than one in each auction. At some point, everyone who wants one will have one or pass on the opportunity to buy one. Not to mention it's peaking on its recent exponential growth curve. It's following the trend of AF 15 recently where people think it's declining, but rather than declining it's reached a price point that encourages buyers to be a bit more picky. Not all 6.0s are equal, and as others have pointed out, this was not a great 6.0. If you're talking about a book with fewer available copies, you take what you can get. The more common books, buy smart. Especially at $100k plus.