If the car could be bought for $15k or less and I had the spare cash I would buy it, go through it and fix whatever needed replacing, but I don't really need two Sevens. The car has 6,200 miles on it and was not driven hard, at least when I was blatting with it.
The salvage title will affect resale value, how much I don't have any way to judge. If you want a good car to keep and not worried about selling it any time soon and the price was right then go for it.
That said, the car has been underwater and you may end up with a car that will have problems down the road.
Here's the original thread when the car was put up for sale a few years ago then taken off the market, there are a few pictures including one under the bonnet.
http://usa7s.com/vb/showthread.php?t=7240
The auction company charges a 7% buyer's fee added to the winning bid for sales between $10k and $30k (max of $1,050) plus a $50 document fee and will collect your local sales tax.