I didn't know what I was doing when I first started this game 2 months back so I sold Tea & Mako's UR's. Is there a way to get them back (besides spending weeks painfully collecting small amounts of keys to farm the characters from the gate)?
to add to my previous statement. If you don't have friends (rip) just post your duelist ID and people can add you, and get in discord, teamspeak, w/e and let you know when they have the card so you can exchange it.
Your best bet is to go into a friendly duel with someone who has the cards and use exchange (rare card from joey) to get the card and summon/use it. You can use autonomous action unit to summon them from their graveyard just dueling them, but its easier to exchange, plus you can get them all done in a single duel.
I needed an UR gem for Riryoku and I sold Ishizu's. Now I wasted thousands of keys and I dont get it yet... On the other hand I have 7 Dark wizards..........
Unfortunately defeating Tea and Mako at level 30 or 40 is the only way to obtain the specific UR cards currently.