It is amazing how much did the market has changed in past half decade. 5 years ago players like FDJ were the low risk high reward players, now they are the high risk high reward players.
Many top clubs being unwilling to let their stars go has inflated the market for players in top sides of lower leagues, they can now demands huge sums for their players, problem with that resale value of those players aren't huge once they fail in top competitions.
Regardless of FDj himself, their need to be smarter alternatives atm, players from mid table clubs now are more of bargains, look at Calcio for example, player like Lucas Torreira would have been great addition to any top side and he has went for 30M.