Thank you for taking the trouble to respond Sam. Appreciate your thoughts and recommendations.The best places I've found to sell are Facebook Marketplace, here and eBay. Looks like a nice frame. Most value looks to be in the frame, forks and cranks. The wheels, seat and mudguards don't look like much to me.
Is that really the going rate for a CB Cresta frame theses days?I think you'd probably get the frame away on Marketplace quite quickly at 80-100 quid. As said above the parts are pretty low end, perhaps donate them to a bicycle recycling? They're always happy to get bits and pieces.