Exactly Dave, that just can't be factored into some general market price guide.
I had £5K to spend on a bike when I bought my MC21SP (having just sold another bike), but it really was that mint Rothmans SP which I wanted (actually had ever since 1992) and not a recent £5K CBR / GSXR / ZXR / R1 type bike.
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Rich
MC21 Track Bike / RS250 NF5 'Spencer', NX5 'Cadalora' & NXA 'Aoyama' / RS500 / Two Brothers Racing RC30