It was me who picked up the RBX 270 - I've had 3 basses from them............
First an Ibanez SR900 - it was mint, listed at £300, I knocked them down to £260.
Second was a well used but perfectly good Westone Thunder 1A plus fender hard case for £99.
And the best was the RBX 270 for £25. Perfect working order but heavily scratched. I sanded it down and waxed it, shielded the cavity and sold it to a mate for £50. The markup wasn't to make a profit - simply reflected a new set of strings and some labour - and it was a wicked bass. I was so impressed with the quality, I've just bought a BB614.
Our local store has a very interesting looking 'Asama' bass - original body shape with a maple neck that is a bit bowed - I'm tempted!! Anyone heard of thes?
Anyway - in answer to the original post - yes - you can definately find some bargains in Crack Converters!!