Q: Need a quick 101 on non-Marketable trade cards value

They are worthless thus people recycle them thus they get rarer thus have higher value.

I would look on price of game (When it was on steam) and if it was been giveawayed

For some people worthless for some people masterpieces xD
here just a bump to help xD

I have some worthless cards I'd be happy to trade for non-worthless cards

For non-marketable vs non-marketable cards: badges with lesser cards worth more. A card from "5 cards set" is better than "9 cards set".

I also remember trading my cards to this guy for gems: http://steamcommunity.com/groups/tradingcards/discussions/2/135508292192047771/

All worth about the same.
Just trade them if you are not going to make the set yourself.

I suggest you to trade NMC for other NMC, and complete that badge, don't involve marketable cards. Yesterday I completed like 6~8 badges with NMC having traded with some Serbian guy in ratio 2:3.

Thanks folks. :)