Yes, they are rare, probably priceless , that you are right about.
It would be good but i have asked for help from many people over the last couple of years, to no avail.
I have been promised Mpu's, Psu's, Loan of decals, reelbands, manuals and more that i have offered to pay a good price for but still to this day i am waiting to hear back something other than "they are at the back of everything else", "when i get around to digging them out", "they are buried", "my dog is ill", "i am busy at work", "i am snowed under", blah blah blah.
I now say nowt, offer nowt and pretty much keep myself to myself and close friends these days, sorry if that offends.