Low price isnt always a red flag. Modified vehicals do not sell well, some people just want a car gone and sell it at whatever price it takes to move the car. I bought a new G37 for 32k, spent 20k in mods, then sold it a year later for 21k. I could have waited and got more, but I just was tired of the car and wanted it gone. I just bought a Harley vrod last year for 12k, spent 18k in mods, and I currently have it listed for 15k. Honestly I would take 10k for it, just because my wife wants it out of he basement.

Just get any car checked out by a shop you trust and you will be fine.