Ah...well, there are a number of low mileage sport bikes out there. they tend not to be ridden nearly as far. Condition of them is pretty easy to spot. just make sure there are no scrapes from being down, and check to see how clean the chain is. that's a sure sign of how careful the owner is with his "toy".
I just bought my 99 Honda Superhawk. it has 18k miles and a good bit of aftermarket stuff on it. it was down on it's right side, but not hard. They guy that owned it was the second owner and he obviously cared about his bikes, because it was clean. The only problem I found was the the rectifier went out on me. typical for the age. And I also found that the battery was undersized. I didn't realize that until this winter when it would not turn over well. I researched and found that the battery in it was 180 CCA and it should be 210.
All that said, about $2500 to $3000 can buy you a pretty nice bike to have fun on. I only paid $2000 for my Triumph and I've thrashed it hard on the race track without any problem. I did have to replace the chain though. Otherwise, it takes abuse and runs like a top without a falter.