I didn't know these existed.
https://www.ebay.com/itm/NOS-OEM-KAWASAKI-1969-1975-H1-D-E-F-MACH-3-FRAME-PART-32002-127/332846267714?epid=1336703923&hash=item4d7f2efd42:g:MdQAAOSwwb1byhrT:sc:FedExHomeDelivery!49080!US!-1:rk:30:pf:0
(https://i.imgur.com/RX40Zqgm.jpg)
That listing is a little deceiving, 1969-1975 is not the same frame. It looks like a late model, 73-75 frame but I am not positive if they were all the same.
I don't really see the value in the frame either, especially at $2000.
If there was no title and it cannot be titled, it would just be an expensive paperweight to me.
I like how in the description he says good replacement for your damaged or missing frame. How does a frame go missing?)