I'm no expert on "sandcast" 750's, but the "rare" items like "wrinkle tanks", smooth airboxes, unfinned oil filter covers,cable operated carbs, recessed ignition switches etc were common on all K0's, not just the sandcast engine model.
Masochist? Probably, but I buy heaps of stuff off Ebay, probably 90% of all my smaller bike parts hanging in my garage including spare seats, tanks, fenders, guages, switches, shocks, etc were sourced from Ebay US, without that resource I'd probably never have attempted another resto after spending enormous (for me) money on my 350/4 resto in 96/97 when I bought all my parts new from my (very) friendly Honda dealer.
I only came across this bike because I punched in "Honda CB750" in the search box, not because I was looking for a bike.
Derek, it'd be a nice restoration project mate, not too hard for a guy with your skills, any K0 (sandcast or diecast) will increase in value in time, it just depends on how long you want to keep it. The "Street Cred" of owning a K0 would be reward enough for some, there are plenty of admirers out there! Of course, I could buy it and you could collect it, then ship it to me, piece by piece? Ha ha, Cheers, Terry.
![Grin ;D](http://forums.sohc4.net/Smileys/default/grin.gif)