The British Steelies Society

I've been offered a fairly worn Fender 400... it'll need some refurbishment and tidying up, but I'd be happy to take it on as a project. Having said that, I don't want to pay over the odds in case I ever want to move it on in the future. I'm no Fender expert, so I'd appreciate some ballpark advice on what I should be paying if I go for it. Thanks in advance!

PS: Four pedals, one knee lever, bridge cover missing, non-original pick-up fitted.