So I've tried the Bronze Pack method trading thing today.
Spent about 20k on Bronze Packs. From the players I put up for sale alone and the coins I made back through "redeem 100 coins" and quick selling duplicate club badges etc.. I've already broken even plus I've got tons of players stacked for the next league releases, tons of consumables to sell and use all for free. I'd imagine for a person with the time to spare to do this, it would be a most profitable way to rack up coins while stocking up fitness cards for the WL and seasons.
My last 25 packs cost 10k, have players alone from SBC League Teams at lowest Bin of 8600 according to FutBin, took in about 700 in redeemable coins and I've got almost ten times as many players in reserve for when new leagues and got easily a bucket load of fitness so I don't have to go shopping during weekend league. Honestly these packs will make a profit of well over 3 times what they cost when the other league SBC's drop. Such an easy way of saving cash.
Just doing some quick math.
8600 on players,
1k on quick sell,
2k on 10 bronze player fitness card
1.3k on team bronze fitness cards
Thats 12.9k with lots to spare and myself sorted for the WL. Happy days.