Been in business for quite some time and I can say I have never charged a restock fee to a customer. We sell a lot of wholesale to other local dealers who give us the P/N and if they muff up, they rarely ask. If they do and unless it was a odd ball, special order, I'll fix them up. About the only thing I have gotten stickier about is electronics, as everybody thinks they can buy the part, install it and if the problem still exists bring it back for the next on their list. Besides the very high probability of damage from other malfunction components makes it hard. JMHO