I forgot to mention, there were a couple models of Ithaca shotguns that aren't as popular and lower value than the XL300 and XL900 models (which are gas operated).
The model 300 and 900 which are recoil operated autos like the old Browning A5. I've held an Ithaca 900 and it felt great and it looks good too. I don't know about the reliability of the recoil guns, they weren't sold for many years.