I am a tough customer when I am buying and I expect buyers to be tough when I sell. I always have manuals and reciepts to show the work and products that I claim to have fixed or repaired. And I expect the seller to have the same !! I have had buyers claim they need to take things apart to be sure before they buy.....so I say..ok, give me a deposit, we will take it apart...if it is what I said it is, you buy it, if it is not what I said...then I will return your deposit. !! That normally shows how serious they are, or if they know what they are looking for. Gotta be a shrewd buyer today, I have walked away from far more than I have bought, and in most cases the buyer of my boats see right away I was honest with them. Worst case is a seller claiming all the repairs but no reciepts !!!
Buyer beware has never been more important than it is today !!