I used to have quite a good collection of 1950s and early 60s film magazines, and a few of my mum's from the 1930s and 40s. But while I was in London in the 1960s, Mum sold our family home and moved to a small apartment - when I came home, my collection had vanished, probably got thrown out - along with my 8x10" glossy B&W gorgeous photo of Debbie Reynolds, personally autographed in green ink. (She was my "idol" back then.)
A few years ago I started buying them on ebay, but realised I was only looking at them once or twice then putting them aside, just hoarding them. So I thought, what's the point. You get to an age when you should be culling all your possessions, not adding to them, so I had to stop looking at them on ebay because of the temptation!
Yes, the ads are great! I've also got a pile of old Australian Women's Weekly mags. and the ads are very entertaining. Some people actually remove full-page ads from old magazines and sell them on ebay - and make more money than they would get if they simply sold the magazine.