Reclaimed fire brick!!

I have a friend who gave me over 100 of these thermo bricks. Are they worth any value? She said they are older then she is, and she is 74. They came from a old building in Mt. Pleasant TX. When i googled, I couldnt find one brick with the word thermo ingraved in it. Please let me know anyone!!

Hi Darryl;   Welcome to Permies!
The best use for those fire bricks is to build a RMH with them!  

Actual value , you could probably get a dollar  each at a farmer market. Maybe $2.00 if your lucky, .50 each if your not.

The name thermo on the brick would only mean something if a person wanted to replace existing thermo bricks with originals.

My fire bricks have several different names on them. Most of the time the bricks are laid flat and you wouldn't see the name anyway.

Doing a Google image search for "antique Thermo brick" brought up a couple of results from eBay where the bricks were going for ~$5 a pop (e.g) but there were very few listings and eBay being eBay I can't be sure if those are legit bids on the bricks or robots trying to build their feedback score. I think with 100 bricks you'd significantly move the supply/demand curve on eBay even if they were legit bids.

I found out that they were made at a thermo brick factory in Sulfer Springs TX which opened in 1901. Im not sure how old these are but I got a few. I sold 10 the other day for 30, he was a brick collector.

https://tshaonline.org/handbook/online/articles/hrt16?fbclid=IwAR2XO7nOwbWC1f4TSYIp1ry-7IfYBI4U_No7Wtf8iYqecueIVkR667Qqrh8

Hi Darryl:  $3.00 each !  That's great, you beat my estimates!    If you sold 10 then the other 90 just need a new home as well!
Maybe an add on Craigs list?  Farmers market / craft fair ?
Or use them yourself! I know your in Texas, so you probably don't need a rocket mass heater... But maybe a nice outdoor cob oven ? For those hot summer days?