Bah TI wasn't any good
There was one TI-99 in high school, but it wasn't worth the time. Too underpowered, too lame. The physics dept had it, but I never saw anybody doing anything in earnest on it.
The business education dept. had an entire lab of Commodore Pets !
(We made the very first malware there - by rapidly POKEing the video adapter into different modes, we got the video chip to overheat - we ran this on every PET in the lab over lunch break, afterwards the lab teacher came back to a room full of smoke and pricey machines seemingly destroyed - off/on and back to work with yew! No lasting damage, that's how good Commodore equipt. was back in the day.)
The *real* retro machine was the Vectrex. I actually got one, years & years after they had been discontinued, and bought the combo cart (with every single game ever released on one menu-accessible cart).
A few years later I was like "man what's up with this old junk" and pitched it.
Moving on ....