Rather than things sitting and relisting, have a feature to where after a certain time period like 60 days have an automatic price reduction by like 1% per day or week till it sells.

edit eBay policies

Or multiply an active listing to 100 drafts (example) with 1 or 2 button clicks

If the buyer purchases more than 1 listing in the same day

Most other programs that I have tried let me copy and paste my variations as long as it is separated by a comma.

It would be great to be able to easily identify a repeat customer!

Ability to view the custom alerts of an item on the Listings table