Accidentally deleted a list set.

[dwalk60]

I accidentally deleted an entire list set. Is there anyway to retrieve it?

[eburtonlab]

I do not think eBay has a mechanism to specifically to undelete a custom list.

If you recently viewed the items, you may be able to find them on your Recently Viewed list.

Otherwise you will likely have to search for the items again to add them back to a new list.