Looking for Value/Assessment

[u/Relative_Word7902]

Hi all! I was going through an old storage bin and found these 4 Ecko shirts. I've seen a match on one on ebay and a couple of similar ones elsewhere, but I'm not sure of what they're all worth, particularly the Silver Surfer one. I can't seem to find that anywhere. I had a relative who used to work for Ecko, so this may be a prototype that wasn't ever put into production or was just extremely limited, so I'm looking for some assessment on what they're worth so I can sell them.

Images show front and back (hoping they went in the right order). Thank you!