360 Challenge Questions/Opinions Needed

Without getting too much into the situation - Im curious where do we see pricing on the 360 Challenge (standard 360C with nothing historic per say) going in the coming years?

Trying to make some decisions on a car at the moment and unsure if its worth the investment where as it could be more worthwhile as parts. That said, where are most going to for parts (OE parts)?

Happy to divulge more if need be, but trying to be somewhat basic on this question as these are two big things Im unsure of.

Thanks in advance.