Very few members except dealers will be both interested in bidding on, and have the cash available for the contents of an over-equipped workshop as a single lot. The specialist items outside their usual business will basically be considered at scrap value. IMHO if you don't want to go fully down the individual item route, you at least need to break it up into reasonable size lots for someone starting out or upgrading, and group related specialist items in separate lots.
e.g. bundle:
* beginner-friendly lots: a reasonable DSO, couple of multimeters, signal generator, bench PSU and a basic soldering station.
* Full rework setup lot: High end soldering/desoldering stations, board preheater, gooseneck inspection camera, (+ monitor if available)
&etc.
Also, location, Location, *LOCATION*. A lot of the stuff would be a real PITA to pack for courier delivery if you didn't hoard the original boxes and packaging + expensive to ship, so you'll get better offers 'buyer collects' from locals, and less work for you. At the very least you'll need to disclose your nearest major city, and your general availability for buyers to collect.