most won't go for it, unless they are asking too much for it in the first place. anything with "insurance" you will prob have to pay for it. i would just use the unknown factor to try to get it as cheap as possible. remind the seller of it may be junk several times as you are bartering. in the end you prob will just have to roll the dice till you get it checked. it's always irritating to pay for somethng and do several hours of work just to find it's no good, such is life.