Selling Question

I have a Denon DCM 5000 100 disc changer and two DCM 5001's. My question is should I sell them together or separately. I don't know if it would be better to auction them or sell them and if they should be offered separately or as a package.
I would sell the slave units first. IF they sell, the buyers must have the master unit.
(since the slaves cannot do all the functions.. And you should make it clear in the ad the slave unit must have a master available to work..)
Then after the slave units are sold, you can sell the master unit.
If the slave units do not sell. Then package them together with the mater unit. And refuse to sell the master without the two slaves, as you already found out the slave units cannot sell by themselves.