Be very careful, mate. If you indeed have that you claim you have, the value of the code(s) would be high. Ridiculously high!
I honestly do not know. I tried searching online for a price, but I don't see anyone selling anymore. I couldn't find a single listing on gg.deals, allkeyshop, inventory.gift or here on ST. So I assume the selling price would be ridiculous. Someone else who is more experienced in this type of deals might help you more. Try to keep a hold on those codes until you form an idea regarding the potential value. Don't rush! :)
Found this, might be useful for ya as reference?
https://steamcommunity.com/app/376870/discussions/0/1643164649216681031/
Hey, I added you on steam Can we talk I've been looking for this game all over and you are the only person I've found that has it
Minecraft Story Mode Season 2 CD Keys
Tf2 keys/unusuals or paypal
I have a bunch of CD Keys for Minecraft Story mode season 2 from years ago. I see it is no longer on steam so if anyone wants to trade for TF2 Items such as keys or unusuals HMU