You might not know these, as they aren't necessarily a bass tool, but they're excellent DI boxes with some welcome extras. I have two of them, both are in perfect functional condition but with some scuffs and scratches about their exteriors. These got used a lot. Great for ghetto-rigging vocals through guitar amps, getting clean sound into a PA, running to house in a theatrical performance, all sorts of stuff. It's great to be the guy who has a DI box on him when the engineer's is giving ground hum and the other is missing.
Again, I have two of these. I'm charging $75 including CONUS shipping for each. http://www.ultrasoundamps.com/image-viewer-diplus.html
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Here's the DI looking pretty next to some flowers: