I don't know anything on pricing but I found one of the most expensive 999 for sale at the moment I think. DUCATI 999 SBK ufficiale F06 RS, ex RUBEN XAUS!!!! | topgtasti.it
Is it a 749 . I thought this was a 999R wouldnt be allowed in supersport but would have been in superbike . Might be wrong though and it could be a 749R . I am only saying this because i'm sure I have seen this bike somewhere but cant remember where .
....AAAAAAAAAAAAHHHHHHHHHHH!!!!!!!!!!! there is no such thing!!!! it is a 749R with some 999RS parts on it.........
Found this: The first thing to know about the RS is: there is no RS. With all other models; the 748RS, the 996, 998 and 1098RS, there was an officially produced model that was sold by the factory as the ultimate race bike for that model. For the 749, the R was the race bike. It was not possible to buy an RS from the factory that had been built only from RS parts. The SuperSports rules specified that the race bikes had to be based on production parts and, although it was possible to buy an R built with RS parts directly from Ducati Corse, the top yoke still bears the identifying number and R designation. Ducati took an R from the production line, walked it over to the Corse production line and fitted the race kit to it. Interestingly, despite including data acquisition, race water and oil coolers and showing no road lighting or emission systems whatsoever, even the race catalogue is simply entitled Spare Parts Catalogue for 749R Model Year 2004.