The Amiga 500 was the first low-end Commodore Amiga home computer. It competed directly against the Atari 520ST and was Commodore’s best-selling Amiga model, enjoying particular success in Europe. Although popular with hobbyists, arguably its most widespread use was as a gaming machine. It was released on October 1st 1987 for $699.00, which would equate to $1,518.92 today.
October 1st, 1987 Source: wikipedia.org
Released sometime in the month of October