comparable cars dont always have comparable values. the car isnt worth that much u can defenetely find a better one. dont waste ur time on this one and have a lil patience when lookin for a car. u may regret later one.
but if u really dont have any patience and u just "WANT A CAR RIGHT NOW"..then......ask him if he takes 20. i wouldnt pay more then that. and just to help u out, here is a tip, Take the car to a lexus dealership and have em do a complete check includin body and engine. They will be able to tell u about everysingle piece that needs to be repaired or replaced. thats how u can really get to know a lotttt more about the car then just lookin at it and information provided by the seller. tell the seller that u will buy the car if there arent too many problems with it and u'll also pay for the diagnostic lexus performs on ur car (around $200 or so),......however, if there toooo many problems with the car, then u wont buy it and HE will have to pay for the lexus diagnostic check.
u can also use all those problems lexus discovers as a bargain to make a good deal and lexus will also tell u the cost of repair. so use it for ur benefit.
hope that helped.