HI, my name is*****'m a certified appraiser, and I'd be happy to help.
Magazines are rarely of high value, unless they are from a very notable event. However, if you want to give me some examples, I'm very happy to review for you.
Mason jars typically resell in the $5 range or so, no matter how antique. Perhaps up to $10 or $15 for very special examples.