Recently I aquired a portable Scisys Express 16k made around 1986 and endorsed by the one and only Garry Kasparov (with estimated elo of 1800). A very handy little machine for the odd game. Also somewhere lurking in my attic I have a Tandy 1850, again endorsed by GK, est elo (yes you guessed it....) 1850. Which looks suspiciously identical to the a sister machine of the Express the "Scisys Turbo 16K". Anyway the great thing is that you can pick these sort of machines up dead cheap nowadays on ebay or in charity shops. And 20 years on, they are still going to be strong enough to beat the majority of us!. So what old chess computers have the rest of you got ?
I have a Radio Shack Chess Champion 2150 (or mayby 2100, I'm not sure which). It plays strong, and has a good variation of openings. Nice look too. I rarely take it out anymore since I have an actual computer. It's a table top, so portability is an issue, but you get a pretty good battery life if you don't use the AC adapter. Bought it in 1993.