What gets me about e-bay is a guy contacts you and wants you to build an engine for his truck,you ask him what he is going to pull with his truck and you pick all the right parts for that application and you don't hear anything from him and then a few months later he calls you up and say's he has a noise from the bottom end.You start asking him all the questions and you find out he has pulled the cam out and put in a large mechanical cam,switched heads and the engine you built him is now in a 70 Camaro drag car instead of a pick-up twisting 7,800 on stock rods,stock cast crank, and on hypereutectic pistons.His response was(well you built the engine).He also left bad feedback.This also happens on e-bay.