https://www.ebay.com/itm/1977-Yamaha-RD400/323981771230?_trkparms=aid%3D888008%26algo%3DDISC.CARDS%26ao%3D2%26asc%3D20131227121020%26meid%3D2ba96496610940d0b4c305fd3ff0c808%26pid%3D100009%26rk%3D1%26rkt%3D1%26sd%3D202824860088%26itm%3D323981771230%26pmt%3D0%26noa%3D1%26pg%3D2047675&_trksid=p2047675.c100009.m1982
Not a terrible machine if I do say so myself... and I just did.
For the amount of work into it, seems a "fair-ish" price for it. Didn't realize the 400's were such expensive gems though.
That's a nice one!