Depending on which end of the market you're interested in, check eBay. I picked up one with case and bow for £40 including P&P ("Uyea Instruments" IIRC). Of course the bow was a piece of rubbish, but still it was a pretty good deal. It's actually a reasonable volume without amplification, it sounds OK when amplified, and it's well set up with a nice action. There's also the S-shaped Stagg ones for around £50-60ish.

Graham.