There seems to be plenty of variation according to how "hip" you are, want to be, or avoiding like the plague...
At the mo the early ones are a hit over the Mono's for "hipstering" as they are already a bit older and cooler... RT/RS's are in some strange hinterland where the price can vary approx. 300% and already hipstered/ruined bikes or "unfinished projects" as they are often called, are from expensive to positively snorted solvents fantasy land...
Obviously, you will probably want to sell it... If it's average and average miles then £1500 seems fair... If it has more good points than bad and is above average condition then try a wee bit higher...
I have had 2 RT's over the past couple of years... £850 and £950... Both were needing a couple of fixes or high miles and I thought it was good or about right...
Obviously GS's went fairly stratospheric a few years ago and have remained there...
As long as they actually sell then eBay is a good rule of thumb but follow a handful to check they are not just flag flying exercises for the sellers ego...
