FREE: Grocery Top Value, All Diff

The listing, Grocery Top Value, All Diff has ended.

GET IT NOW (GIN) for 15,000 credits before someone else does! Will be mailed next business day from one of those USPS blue mail boxes or from inside the Post Office.

I have no idea what these were until I read online.
Something about the grocery stores would give them out, maybe with a purchase?
And then you saved them and then you could redeem them for either cash or merchandise?
Comments welcomed! : )

Each one has a different 'value' and numbers and all but one has a triangle on them:

2ACA 941
VDO 973
2AAS 13
and so on........
They all seem to have the original sticky gum on backside and only one has slight bend
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Winner receives all stamps in 1st photo, others are close up and different angles. Please be sure to look at the photos of the backsides, some minor flaws.

Type my Listia ID in the search box to find all my auctions. My ID: SnailMailGalPal *SMGP*

Starting new auctions nightly!
My auctions start and end every Saturday between 6-7:00 PM, (Unless GIN is used first) Seattle time. Will be mailed next business day from smoke free home.