A realistic value is $225-275, so paying for authentication makes no sense. Even authenticated examples routinely sell in this range. Yours does look nice, unless there are issues which can't be discerned from the tiny photo. If it's free of smearing or anything else, you may try to ask for a bit more than my estimate, but don't go too crazy.
You could always try selling it on this site for free. Post in the category featured in this link.
https://www.net54baseball.com/forumdisplay.php?f=38
I also would NOT waste your money paying even $18 each to have those other ones authenticated. They are barely worth the cost to authenticate (in some cases,
less!).