Well I still think you should have some sort of paperwork for the sales you do for others if you collect all the money then pay out a portion for the goods you sell.... any emails maybe or a contract to allow you to sell their items ? But if all you really have is the WU payouts then hopefully that will suffice in an audit. Just remember in an audit the IRS will say "prove what those payments are for" because they will take the position that those were non deductible personal purchases and not business ones.
