@Amigadave:
I have an A4000T here (equipped with a Quikpak 060), so ne need for it. A second machine is nice, but I try to limit my collection to classic (non PPC) Amigas and only one of all (well the most) models.
Also I am not very confident in the concept behind Amibay, so I do not think I will go that way.
At the moment I have suggestions from: give it to me cheap up to do not give it away below EUR 10000,- and two kidneys, but no real offers.
Yeah, if you already have another Amiga with an 060, you don't need to trade your CSPPC for a 2nd 68060 accelerator. Also, I forgot that AmiBay does not allow asking what the price should be, so scratch that idea.
If you want to get the most money for your system, you should probably part it out on eBay one part for each auction. Usually, if you sell the whole system together, the price you get will be a little lower, but maybe not in this case.
Again, good luck with your sale.