Ello, any suggestions as to what an 04/05 Stumpy Comp full suss frame in good condition would go for or a method for working this out?

Cheers,

list it on ebay, 10 days, shedule it to finish at a sensible time, plenty of photos, honest description, and a stupidly high reserve to make sure you don't sell it, it will then find it's own value.

Sold my 04' SWorks Enduro on Ebay late last year, for a Buy-It-Now of £300. Sold in about 2 days so I suppose I under valued it slightly.

The advice above is good.