Martin wrote:

The latter - you use a wrench to adjust the legs. The bases are
manufactured by Terradyne to support large heavy test-equipment
towers. Probably not conducive to a single-lever lift.

That's Teradyne and they manufacture high end test equipment. Here's
something on eBay that looks like it might have a base like you have
on part of the equipment.
http://cgi.ebay.com/Teradyne-973ST-D...0702QQihZ013QQ

I would suggest that you remove your listing from Craigslist and do a
little more research to determine what the things s are actually
worth. I would not be surprised if a Teradyne base sold new for a
thousand or two. You should also target your audience and post
listings on used test equipment web sites.

R