i have a 2000 with almost 40k miles and a turbo just got installed on her. before hand, i took it to the track (like 50 passes!!) and never hurt her once. i have only driven 7 or 8 of those 40k, but never had any troubles and no problems. miles on bikes i dont think matters, except people 'think' that the higher they are, the closer they are to blowing up. which is true....but mine has nothin wrong and i am confident in the bikes stregth.
i say hold onto it and rip the miles out of her. if you own two bikes, thats losing on two depriciations. i would imagine one with high mileage to depreciate less than two with miles split. IMHO