I tried it logged in as both the owner of the listing and as the admin.
The way the site is set up – logs in – a page screen appears with text at the top and their listing below. On this page – the only buttons that appear are: View – Edit – Delete
If they click on View – the edit screen appears and there is an “Upgrade Button” that does work fine.
But if you click on “Edit” – you go thru the editing process and are never presented with the option to Upgrade.
The client wants to stress the upgrade option and therefore want it to appear on the first screen the lister sees -ideally they would like me to be able to include on an informational page but they would be satisfied if it appeared on the first page that the lister sees above.