need opinion

[eastcoastS14]

i have been looking for a 240 since i totaled my last one. Anyway, I have found another one that looks pretty good to me. The car is a 95 with 96,000miles on it. The woman has owned the car since it was new from the dealership....the thing even has the original radio in it etc. Anyway, shes asking 4k for it, problem is the car has been overheating and was stalling occasionally before. she just had the dealer replace the ignition wires, water pump, and thermostat. The car is still overheating and the dealer told her its the headgasket. First im thinking of offering $2500-2700 for it...does that sound good to you guys? also Ive never replaced a head gasket and im wondering how easy it is, also what else could be causing this the HG id like to kno what else i could be looking at since i kno that often one problem turns into another