Vintage T-Shirt Forum & Community Authentication Appraisals

Hey all,
Fairly new to the vintage tee scene and hoping to tap into some collective wisdom here. I’ve got a tee I recently listed, and out of nowhere someone’s offered me £300 for it. Bit stunned to be honest, wasn’t expecting that kind of number. Just wondering if anyone can help shed some light on its value or give me an idea if that’s a fair offer or if I’m being lowballed (or lucky).

Appreciate any insights, seriously. Thanks in advance.

Measurements:
Pit to pit: 21”
Length: 29”

One recently sold for $700 USD, they have gone for higher in the past, so I would hold out for more!

Really appreciate the heads-up. Since then, I’ve actually received two other offers, one for $605 and another for $670. Honestly, I would’ve jumped on that first offer if I hadn’t taken the time to reach out here first.

love it! cheers!