I don't care what E-bay's sale fees are; $600 for an unknown condition meter is an absurd price!
Especially for one who's accuracy is +/- 3%!!!! Someone can buy a known working HP 34401 or other high quality, high accuracy meter that is well documented and is repairable for far less money.
If you don't want to pay E-bay's fees then there are plenty of places where you could list it for free. Including in the sales section of this forum.