I think they might have run out of stock or forgot to input numbers for the price, so it defaults to $999?
The most expensive I have seen of people actually selling was in a store in my city. This was in late september/early october of 2003. They had a morgan duron 1.2Ghz $89. An xp 1700+ was twice that (palomino). I also saw them charge a guy $75 to stick 64 more megabytes of edo ram in his early pII box, asking if it will make the internet go faster.