Pucatrade is great and has its own economy. If you decide to sign up use my referral because it gets you bonus points right off the bat.
https://pucatrade.com/invite/gift/4391
With the link and within fulfilling a few other requirements you can get a 5-10$ card for free or put it towards a different trade. People are trustworthy and it allows you to trade around lower value cards (Probably my favorite part).