Up for sale are vintage Radio Shack TRS-80 Computer Products 16K Memory Expansion Modules. The box says \"RAM Expansion Module for Use With MC-10 Micro Color Computer\". There are 5 of these for sale. The last one that sold a couple months ago worked perfectly so I\'m assuming that these also work perfectly because they have never been opened until now for pictures. I do not have an MC-10 color computer to test them. I used to program the TRS-80 computer and a Timex Sinclair that used very very similar modules. I remember paying $199 for my first 16K expansion module back in the early 80\'s.