4600.com expired at GoDaddy auctions and just closed at $68,000. This sale should go through at some price at least it can’t be renewed.
Back in September 4065.com closed at $14,294 but apparently some people didn’t pay and the name was eventually settled at $504. Someone I know confirmed the non paying bidders and must have shared it with Namebio. The name sold back in 2009 on the cheap too, $282 on NameJet.