Escrow would be the safest way to go about it, however, there are usually fees involved which would eat away at the discount you’re offering.
I don’t think you’d really have a market here selling at 99% as the risk/effort involved is too great given the savings of $1 or $2 that can be made.
Excuse me?
Hes a post spammer. Probably a bot.
RE: OP:
You are never going to sell these at 99% when people buy gift cards at 10% off all over. If you have a great rep SOME TIMES people will pay face just for the assurance, rarely, but you don't. If you are serious about selling these go 90% or enjoy the cricket sounds.