Very confused on what to do now.

When OP13 got fully revealed, I wanted to play Sabo, but him having x4 SCR and each of them run around 10/15€ be a little expensive to spend on just a playset

Then, Imu looked good, Doesnt seem expensive at base rarity, I played it good, but it seems "too" meta, I enjoy nice decks but not bdif/bdif contender (Still, I will play this if no more choices)

Ace looked nice, seems very nice but not top1 nice
Problem? Yamatos too expensive, TaxBeard gone up in prices, I could handle this
But then I was told PRB02 Marcos are prob gonna be like mihawks?

Im very confused on what to do, as If I buy a deck rn (The stuff that's out now), it should be cheaper than when it releases, but then, if the new stuff is too expensive, I will be left with some cards I wont even use

To try and explain myself better, is it a nice idea to prebuy stuff now? Wait for PRB02? Any ways to know estimated prices of unreleased cards so I can say if its gonna be low/mid/high price?

Ik this is kind of a stupid post and I understand it, It's just I've been trying to figure out what to do now after a week and I'm still confused on what's the best step

Thanks.