A US trademark search shows that "Just Say Rock" was first used in commerce in 1990, registered for trademark in 2004 and cancelled in 2012.

"Hello! My name is Inigo Montoya. You killed my father. Prepare to die!"

Lol, yeah I figured it's probably nothing. Just din't want to find out after the fact that is was some rare dot signifying something random. Hehe.

I don't think this is anything special, but I had to check first just in case, lol. Does anyone know if there's any significance to this tee? Its just a big black dot on a red 1980s Sportswear brand 50/50 tee.

Looking for the possible value of this tee I found yesterday. The front is a Harley eagle logo and the back shows it's from Phil Peterson's Harley in Miami. The tag is very faded, but you can still tell it is a Mayo Spruce tee. It is very good used condition with pilling and a few little faded bleac...

Ended up selling for $45

Post a picture of the tag as well for help in dating it!

Not sure as far as value, but "Keep Diggin" was first used in commerce in 1997, filed for trademark in 2001, and trademark expired in 2014. So I'd think it's most likely a post 2000 tee.

Looks like it's called "Butt Racer" and, unfortunately, it looks like you can still get them, too.

http://www.posterpop.com/kozik-butt-racer-t-shirt/

Here's an obscure one. "Hand Prints" brand on a ©1990 novelty tee.