I'm sure this is a known bug, but when I go to my legacy shop's page, nothing appears under Edit Items. So, how can I get them out? I can't from Account Search either.

If I delete my shop I'm assuming those items go to my inventory? Some of my shops are small enough to do that but not all of them.

I believe it is a known issue at the moment. And don't delete the shop as I believe that also deletes the items. We all just have to wait until someone gets time to fix it. :)