I was going through a box of old stuff in the basement (kids books, coloring books, etc) and was digging on the old price tag stickers that were still on the items. You don't see too many place using them anymore (Kmart is the only place that comes to mind). As a collector of all sorts of old nonsense, I like it when they're left on. It's the history of the item boiled down to a 1" square space. And, when it's something from your youth, it triggers the memories of when you first bought the item.
It's like "Yeah, here's that GI Joe coloring book from Walgreens that was bought to keep me quite on a visit to an elderly relative in a nursing home 25 years ago."
And thanks to retaining important memories like that, now when I go to Wal-Mart to buy trash bags, I end up walking out with Night Court season 1, egg rolls and a "Tiger Force" Flint GI Joe figure instead...
Anyway, I think they're fun little reminders of yesterday; from stores long gone or still going strong.