There's some really nice old Raleigh bikes out there.
Recent ones I have seen go on
ebay - 1990s Raleigh Elan 12 speed Reynolds 501 tubes one owner from new £60. 1980s Raleigh Clubman Reynolds 531 tubes 12 speed Campy groupset £60. Don't bother with auctions that end on a Sunday evening, people tend to bid silly at weekends. Stuff that ends on a weekday morning 8am-11am seems to go for a lot less. Avoid any Peugeot Carbolite 103 stuff, best go for a quality lightweight steel frame from Reynolds.
Steel frames ride completely differently, generally a lot more flexy, comfy too.