The prices went down during TotY, up again now it seems. But yeah, in general it doesn't make a lot of sense. I play every year and still can't predict it.
Also, I assume you're aware of this for SBCs?
https://www.futbin.com/squad-building-challenges/LEAGUES/8
Unless you think it's fun finding combinations yourself. If not, this is the cheapest way. Giovinco for 125k isn't bad at all considering the packs you get in audition to the player.
Edit: Also goon, have you tried Dybala? That's a great team, but I'd have him before both your strikers.