If you think an sbc isn’t worth it don’t do it. A lot of sbcs are just done with extra fodder. There isn’t much else to do with fodder.
It’s basically a gold sink. You can’t get back better than what you put in or you will devalue everything. It’s like at the end of the year when you can just reroll 85x10 and get every player. It makes everyone discard price.
The problem with the market is players are already all at discard besides a few top players. So when you open a pack it’s not worth anything. The only reason golds even hold value is for sbc fodder even then they are not worth much.