[W] 2 TF2 Keys [H] Borderlands 2

If i add and 2 summer adventure cards. You can sell them quick and all together are more expensive that 2 TF2 keys. So 1 TF2 key, 1 Dota 2 key and 2 Summer Adventure Card? Or i can sell them and buy another tf2 key but i need to be sure that you will have a copy for me.