Harper's New Monthly Magazine
Harper’s, the monthly magazine, was first published in June of 1850, and initially cost $3 per year.
Seems cheap, but:
$3 in 1850 is equivalent in purchasing power to about $121.80 today, an increase of $118.80 over 174 years. The dollar had an average inflation rate of 2.15% per year between 1850 and today, producing a cumulative price increase of 3,960.16%.
(https://www.officialdata.org/us/inflation/1850?amount=3)
I just subsribed for $46 – an absolute steal!