I have played T-Mek, and it's a great game! It would be awesome for you if it sold for your asking price, but you would have to find die-hard T-Mek fan. It sucks, but I have seen collectors (on klov) sell true classics like starwars cockpits, missile command cockpits, and even red baron, just because they take up so much space!
As far as a value goes, I usually price x-large jamma-era games on the monitors (of course, there are exceptions; X-men, SW's Arcade)...a recapped 25" 15khz monitor will fetch around $150 bucks on ebay, So two working 25" monitors uncapped would prob net you $100-$125 ea. Everything else, well, that's again up to how much the buyer "wants" this game.