Back to Nathans eternal question as to "what are the genuinely rare bikes in 2008"? I've always had a soft spot for craftsmen built low volume bikes like my Cheney Yamaha and certain Metisse models. These bikes were rare when new and rarer now. I don't mean the replica Metisse and Cheneys being made again, I mean the stuff that will never be replicated such as the Metisse DT1 and Bultaco and Cheney Suzuki and Yamaha 2 stroke units.
Blair Harley bought a number of Carabelas into Australia but I haven't seen one in years, where are they? They were as common as Coopers back then and Coopers are still reasonably well represented. Not so Carabelas. I also agree with Adam. I've seen a shitload of YZAs over the years but could count the DT2MXs on one hand and can't recall seeing an RT2MX ever. DT1MX and RT1MX weren't sold in volume here. My mate Warren Wilson bought Peter Scaysbrooks Vic Lyon prepped DT1MX red tanker back in the day and it was the only genuine one I saw in Australia. My genuine RT1 came into Australia in parts in the boot of Pete Geohegans Mustang and it's also the only one ever saw in Australia even though I'm certain there were more.
I recall seeing a line of around 10 RH74 and one or two RN74s at Hazell and Moores Elizabeth st showroom in 1975. Nobody wanted them as they had old school suspension and didn't rate when compared to the new RM model range.
They were as cheap as chips in a bid to get rid of them. My mate almost bought an RN but once he was told that there were no parts available over the counter, he changed his mind and bought a 440 Maico off Blair Harley instead. I haven't seen an orange tanked TM400 for years either come to thin of it.
Any of the pre Uni Trak Kawasakis are rare, especially the pre KX f11m, f31M AND f81m.