They would be better off auctioned separately unless they were obviously a set.
I did buy a set of 3 cat dishes last year.....................at the last second
One of probs of say job lots is that if all items are all different, peeps may want one but not all.
At the end of the day its up to you, the owner to decide how to auction them but suspect they might make more money separately, but of course I could be so wrong
Auctions are so totally unpredictable and ours certainly follows the pattern!
Maybe nearer auction time you could send me a picture of them and I will give you my best but not necessarily right advice