You could probably easily sell the sled individually and the two harnesess individually as well. $100 for the sled (50 GBP?) maybe?

I don't know about the price for a 30gig player, but maybe a maximum of $350 (175 GBP?). I used to keep a close eye on this stuff, but I'm kinda forgetting it now.
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FireFox31
110gig MKIIa (30+80), Eutronix lights, 32 meg stacked RAM, Filener orange gel lens, Greenlights Lit Buttons green set