@michaela2001 We had one of those when I was a kid, my Grandfather paid $500 for it, the touchpad gave out after a month, the store wouldn't take it back, so my Grandfather staged a boycott of the store with all his techie network, the store went out of business within six weeks. My Grandfather being an electronics engineer took it apart and discovered cracked ICs and bad soldering, which is most likely why they didn't last long on the market.
@NativePortlander1970 I bought an add on keyboard for it. It was a very easy job to open the ZX81 & fit it into this full sized keyboard, along with its 16k memory. The longest job was putting all the stickers on the keys. I believe it was one of these.
