My team in OMA (though now the league falls apart thanks to FB) I have bought a bunch of FA's, the gem of them all was worth 1M & an ST! In the beginning levels I think it is possible to build an entire team with FA's, since many people release the first few products of their academy that cost T:
I did sell one for $ but the rest are still on my team. I haven't got the best team by far, but I have the best value..
and too, if I could train them I think they would play better, but not using green packs this League.
Also got a backup 18 y.o. GK FA.. two points from 4 star, very good for the budget.