A big plus one to the advice already given. I know that once you see what may possibly be "the one" it is hard to walk away from, but I would walk from these. My buddy/co-worker just picked up an '01 Savage 650 for $1k. Of course, he is an engineer and as such, he is less prone to making rash decisions. He waited for this deal, knowing what he needed out of a first bike. He spend a lot of time in the parking lots riding in circles and also took an endorsed msf course prior to purchase. He is spending his first year on two wheels correctly and hopefully it will pay off in the long run.
So, have you taken an msf course yet?
ps - I would personally find it hard to lowball the seller of a bike I dropped on the test ride...Just my $.02!