1950's Swansea 5 Swan track/race frame


I really have no idea of the value of these sorts of bikes so curious as to what others think. The advert can be found in Gumtree (thanks to Causal Cyclist for drawing my attention to this one).

More details in the Gumtree advert but the seller is asking $500. Is that reasonable?


the guy is on this forum, do a search in the for sale section.