Over the last couple days I have been buying 97s for 300k or less then just posting them back for 375k.
I post them for 1 hour and usually about 20% of the time it sells the first time I post.
Seems like the Combine, Weekly Wildcard, GG v2, and Superbowl cards sell the most often.. I stay away from UL and AKA.
I have probably sold over 100 97s at 375k at a minimum profit of 37.5k per card!
The best part of this is whatever cards I don’t sell I will have at about training value for the Easter Promo.. it’s a win win!
I would only really recommend if you have a decent coin stack as you have to be okay with cards sitting for a while or just QS for training.