Myyyyy God! That is pretty, but i can't use such a beautifull thing. I hope someone here snags it and turns it into the ultimate 'bling' Twenty. It belongs in a Raleigh museum. Nice color! The fork is not important, one of the best things to replace anyway.
I doubt it will actually go very high the price, unless two guys that like building bikes end up bidding, but most people don't like 'frame only'.
By the lettering, color and name i'd say it was one of the latter models/last ones in production but i could be wrong.