Selling at a lost

My watch didn’t know it was a leap-year.  I’m fine with that, really but it was a sufficient excused to come into work late.  After work, I headed to Friday Night Magic where a player had an unusually good selection of cards he’s looking to sell.  I bought about $200 in cards for about $120, not bad and I asked him where he got them.  He didn’t tell me but when I got the cards,  I started looking through the plastic sleeves and found a business card for a company that sells cards.  After FNM, I checked the firm’s page online.  I checked the card values there and it was about $220 in total.  Either this kid is a thief or an idiot, either case, I will avoid him in the future.