Modern Maturity was a popular publication by AARP, with its first edition in 1958 and its last in early 2019. However, the magazine isn't in circulation now and has been replaced with AARP The Magazine.
Back issues that are well preserved and in good condition can potentially hold value, especially earlier issues that may have higher collector interest. In general, the value of these magazines can be quite modest, with most individual issues selling for a few dollars on online platforms like eBay, ranging from $1 to $5 or more, depending on the specific factors mentioned earlier.
Collectors may be particularly interested in early editions, special editions, or editions featuring notable articles, interviews, or stories. If a magazine has a higher level of rarity or a specific collectible factor, it may command a higher price.