I like to talk about how much things have changed about computers since the old days, but this YouTube video ad shows how little things have changed. Like buying used cars, rarely does an advertised price for a computer match up with what you wind up spending.
The computer in this ad looks like a KayPro II. The ad lists it at $1,295. I don't know the exact date of the ad, but the KayPro II was around in 1982. Adjusted for inflation, that's over $2,900 in today's money.