Yea I saw the message unfortunately I cant do that trade..I pick the SPX Winning Materials up for $1-$5 and $2-$ depending on where they ship from..I have some extra Marvins that I may be able to trade you , but I cant do it for the card you want...
I can give you the following Marvin Rookies to help with your UNC guys
2 Bowman Chrome RC's
2 Bowman Gold RC's
3 Topps Style RC's
2 Topps RC's
1 Rookie Debut RC
1 Bowman RC
1 UD Slam RC
1 Topps Total RC
10 SAGE RC's