In an effort to help control the auction house I think it would be extremely beneficial to display gamer tags or at least partial gamer tags of people who post items.
People's greed ruins other players time. This way when looking for a specific player it will be shown that one person has bought all the available cards and now controls the market and price gouges.
Full gamertags would mean when someone has something grossly over priced they can be messaged with a reasonable offer so both sides can benefit. I understand full gamer tags would lead to spam, hate messages or begging but I think we can let Microsoft/Sony/whoever sort them out provided they get reported if it's really spam/harassment. Partial gamer tags, say the first 4 letters, would at least let us know is this one person gouging or is it really just the market price. Also it would give us the opportunity to choose who we purchase from so if we see a common gouger we can give our business to someone more fair. Maybe even put in a simple thumbs up or down system after completed sales so people can have a rating system associated with themselves to further quell gougers. Just spit balling here because I am tired of giving coins to people who have way too much coin and time on their hands so they control the market when some people who don't have that kind of time have to sit and watch until someone finally undercuts them.
Everyone can benefit from a fair market, I have always done well flipping cards and finding snipes, that is not my issue, it is intentional gouging for the sake of gouging. Players don't need and shouldn't be encouraged to take advantage of others to get ahead we can all earn just fine with a balanced economy.
Also it would help with the conspiracy theory that EA buys and sells cards to control the market, unless that's exactly why gamer tags are not displayed lol but seriously Forza has also been nice enough to inject cars into their market when it dries up or gets out if hand to help players out when they have an auction house in their game. EA could obviously see gougers a mile away, throw on a reasonable card and then it forces the gouger to drop their price or never sell their card.