Ah the elusive 08 Cr.....
Just to clear this up for the confused and ill informed.
Yeah those dont exist. The cr began production in 08 but was not sold until 09, thus all 1125cr's are '09, '10 model year machines. If it has/has had a diamond blue frame at one point it is an '08 1125r converted into a cr. Which by most people's standards means just switching the headlight assembly and ergo's. Correct me if i'm wrong but I do believe '09 cr's had black/red airbox cover logos whereas the '08's had black/Blue. Easy give aways. Or you could just give the vin a gander.
On most r/cr conversions, the "conversioner" if you will, often overlooks the gearing. The 1125r final drive sprocket is geared higher than the 1125cr. The swingarms are also different with the cr having a slightly shorter wheelbase.
Having said that. Early 08's have a parasatic software malfunction in the cluster which unless the killswitch is NOT switched off before the ignition the cluster will continue to draw from the battery. '09's have stator failure, lots of info on this around here.
4,000 miles on a 6 year old bike could go either way. On one hand you're getting an essentially new bike thats already been broken in, hopefully correctly. On the other hand you possibly getting somebody's weekend track or drag bike. Maybe its been sitting its whole life but hard to tell sometimes. Another thing to keep in mind, in the wild world of motorcycles usually if anything major is to go wrong with a bike (as in faulty design, factory flaws, etc etc) it wil USUALLY happen within the first 12,000 miles. Just things to keep in mind. At 4k you'll also be due for some maintenance near the end of this coming riding season.