This IBM 5110 advertisement was from the February 20th, 1978 issue of TIME magazine. With your choice of BASIC or APL programming language, diskette or tape-based system, the 5110 can be custom configured to fit your needs — all for under $18,000 ($54,844.75 in 2005 dollars). View full-sized advertisement here
There was a time when $18,000 wouldn’t even cover the monthly cost of a new computer. But the new IBM 5110 Computing System shown above sells for $18,000 (other configurations range from $10,000 to about $30,000).