Can I also keep the revival of this very old thread to ask the same essential question as the OP did?
There is this Raleigh Carlton Grand Prix for sale.

He's had it up for about 2 months so I asked if he'd come down on the price and he said $180. I feel like this is potentially a very nice bike but actually needs a decent amount of work (the chain doesn't look like it fits, bad saddle, needs new tires and tubes, new bar tape, new brake lever hoods likely, needs a strong cleaning and doesn't have the original decals). I don't need it, but I do like the frame and would appreciate a lighter steel bike. I know ultimately it's worth what I'm willing to pay for it, but there's also a reasonable objective value to these things right? What do you guys think?

The seller says: 1960's era British-made Raleigh Carlton Grand Prix Road/Touring Bike
53cm c-c x 56cm tt
All original, estate sale find
5sp Simplex derailleurs & shifters
Weinmann brake levers paired with Weinmann Vainqueur 999 centerpull calipers, Milremo stem, generic bar
Very nice Carlton lug detail & brass headbadge
Steel 27" clincher rims laced to Brampton steel hubs. Rear is a flip-flop set up. Tires still hold air.
Stronglight cranks, original quill pedals
Good overall condition with a few paint scuffs and surface abrasions
Recommend new seat and tires to make it a decent rider
Replacement decals available on eBay
Asking $200