Pls assist with a price reference.

I've been searching the web to get a benchmark value for a Rossin frame set that has presented itself. I've been asked to make an offer. Obviously I'd like to make a reasonable offer and conclude an amicable transaction. The frame has a few nicks and marks in the paint work but no dents. Do you have any references for anything similar or an estimate?

£50 - if you get rid of the gaudiness...