id hardly call that 'collectible' at this point, they tend to get beat the hell out of by junior racers then moved on. My local shop supports lots of racers and always has 65s/85s/125s rolling thru there for the youth racers. LOTS of them for service work. but i don't think that's quite in the collectible range yet. its a tool more than anything at this point. sweet bike BTW.
I mean, i had my 72 R5 listed for 5k, had some interest but no serious bites. Stock paint, really nice, clean title, and fresh motor w rd topend, digital programmable CDI, (thats almost 1k in ign parts alone), chambers, cnc'd rearsets, etc, ALL service work done, turn key ready to go, and all the stuff to take it back to stock. I also don't care if i sell it, but i've seen way worse sell for more. Hence, the market is fickle on 'collectible' or 'desirable' depending on the minute of the day. lol.