Coliced horse for sale.?

I have a horse that is currently for sale. He coliced 1 year ago. He is a very valuable horse, big and a big jumper, but I am being told that he lost his value do to the colic surgery, is this true? Would you buy a horse that has coliced? He has had no problems since and it was a very mild colic, meaning he didn't lose any intestents or anything. Your opionions are appreciated.