Have a feeling on this first deal TIPS??

I got a deal on craiglist with a 3-1 800 sqft, doing my homework on it few comps around the area are 80k, 21k, and 4ik. question one What are a few good websites to get some comps? website i currently have dont seem too reliable.

Im planning to lock up the property asap and assign it or get a personal loan to pay cash on the house which is at 20k btw and then get an equity loan on it in which i believe the fmv could be 60k just need to make an appt. to view the home because its more of a rehab job some which included
RooF
Floors (carpet falling apart)
what do u guys suggest as my first deal ?
any tips could really help this could be my first deal :]