I'd say it depends on the other gun/s you would be interested in buying.
Anything that might be on a ban list or a target of treasonous political types are so explosively overpriced, it's not worth buying unless you feel you absolutely need one now. If that's the case, spin the wheel, roll the dice, insert additional gambling metaphor here.
However, if you are looking at buying guns that are "safe", like a classic bolt action or lever gun, the prices of those have not increased. Or at least not on the same level of rediculousness as the EBRs.
Gun accessories will be around even if the guns they are for do get hit with the ban hammer. I'll still be able to get BUISs for my AR even if my AR gets banned. Magazines are a different story.
You're just not giving us enough info to go on to really give you solid advice.