[quote name='flyfisher' timestamp='1375224952' post='2158636']
What about a Hofner violin bass? I've read that Macca only paid £30 for his one but it must be worth well over £100k by now.
[/quote]
I may have mentioned this before, but I had a 1960s Hofner Violin Bass. Played like a dog, sounded like someone kicking a cardboard box - so I sold it for £15 (including the original case). In terms of the actual instrument, I did the right thing. In terms of investment it was probably the biggest mistake I ever made.
If you want a usable instrument, find one you like and play it. If you want an investment, it's sheer guesswork - but I suspect that most modern Fenders will never fetch a premium.