It's a good scam tho:
~ Compromise a reverb/ebay account
~ list an item at a good but not insanely cheap (and thus suspicious) price
~ someone buys it
~ pay ups/dpd/rm/hermes/whoever a fiver for a tracking number
~ add the tracking number to the sale details
~ ebay/reverb start the payout process as soon as the tracking number gets listed
~ the buyer sees a tracking number so thinks its on its way
~ fake seller gets money & drops off radar
~ takes a few days until buyer starts to worry