that sounds a bit high for me. especially with that much mileage. check out edmunds or kbb.com to get a ball park figure. i got my 96 ls for much less than that, it only had 58,000 miles, and it came with 17" bbs rims, neuspeed springs, and a catback exhaust. is it from a private seller or a dealership? if it is a private seller, is this person the orignal owner? does it have a clear title? ask for maintance records. does it have any mods, and if so what kind? usually mods actually lower the price of a vehicle because they are indicative of a car being driven hard. i would ask for paperwork concerning the head, and the reason why it was rebuilt, and what kind of rebuild it was. ie, was it a stock rebuild, or was it rebuilt for a FI application, or did the timing belt break or something catastrophic like that happen to force the rebuild. is the owner a younger or older person? was it turboed? look to see if there is any evidence that the car was run hard or mistreated. if everythng worked out would offer them $5500 or $6000 at the most, but that is me and i am cheap/poor. if they dont go for it, oh well. just keep looking, there are plenty of good deals out there, but you have to keep an eye out for them. good luck