I wouldn't go for one that's been down and kept outside, probably uncovered (based on the rust seen on the pipe and some bolts). You can find cleaner ones for around 2500 or so, around here at least. Aside from that just know that you will need the reflectors front and rear sides as well as back for inspection... tiny detail but wanted to mention.
I suggest finding someone local (maybe even from here) that knows bikes to take with you, offer to buy dinner or something now could save you tons later.
Good link on buying a used bike...
http://www.americanmotorcyclist.com/...Checklist.aspx