There are a whole load of old "Dogs" (BMW R45, Yam XS 250 & 400, Kwak Z400 twin to name just a few) on evilbay right now, all listed as "cafe racers" at STUPID prices. Almost all are unfinished, badly engineered tat that's about as far away from a cafe racer as you can get (some even have knobbly tyres ffs) but idiot Hipsters seem to want to pay for them in their droves.
I don't know if anyone else remembers this - and he didn't tout it as a cafe racer - but Henry Cole picked up (IMHO) a half assed, half finished, botch job of an old Z400, cleaned it up and then proclaimed it to be worth £1,600 (on something like She'd & Buried). I wasn't surprised when he didn't sell it (decided he liked it so much he was going to keep it) at that price. I'm no expert, and Henry is, but I wouldn't pay that much for a Z400 unless it was functionally perfect and looked like it had been really looked after (almost concours condition).
Maybe I'm just a boring old fart !