I've got one Dr Plumb which is quite old but in perfect condition. It's a bent billiard and I really adore the old guy. Smokes like champ.
I find the older London made pipes to be excellent smokers. Look at GBD, Sasieni, Parker etc. Only my two Dunhills (1945 and 1980) do not perform so well :shock: I would say pre 1980 you can go for most London made pipes and you won't regret it.
I have a Dr. Plumb metal pipe with a briar bowl that I smoke a lot especially if I'm going to be puttering around out in the yard. It's a fine smoker and like you said they're reasonably priced.