If you attended the Kansas City Sports Collectors Convention in August 1981, you had the chance to pick up a Joe DiMaggio autographed collectors print done by John Martin. Here’s an ad for it from Trader Speaks.
You can read that Martin limited the number of 18′ x 24” prints to 325 and signed them, along with DiMaggio. Autographed prints were $75, while unsigned copies were $60 at the convention.
I tracked down this copy, numbered 35/325, on the website Everything But The House, where it sold for just $91 in September 2017 (most prints by Martin sell for a couple hundred dollars these days).