There's nothing to buy and they're not selling you anything. It reminds me of the old days on the internet, when it was mostly information. So this is simply for entertainment and and reference.
This site has old advertisements for the 20's, 30's, 40's, 50's, 60's, 70's, 80's, & 90's. You can search by product and specify the year or just browse an era. I like looking at the ads from the 70's and letting it take me back to childhood. They also have the ads grouped in categories, so if you just want to browse through a variety, you can.
This site is basically to pass the time. But it's neat to see the old stuff and remember the days.
Four stars because it's "Cool", not five, because I don't really "use" it for anything other than passing time.