The cherry on top of a bulk bag

So today is my birthday, and among other things that my dear girlfriend bought for me, there was a bag of 1kg of coins. I was looking through them and inputting them into Numista, when suddently I see a very small but in a great state (for a bulk bag) 5 Mexican pesos coin (probably AUNC). I look at its entry and I read the following:

According to "Banco de México" and "Diario oficial de la Federación" (Federation's Official Log), 1987 date for this coin presented several inconsistencies, such as defective alloy which caused the coin's design to change when struck. This was detected at Mint, and most of the near 82 million coins where rejected and destroyed before leaving the Mint house. Only the final batches with the corrected alloy reached public. An estimate is that only 1% of 1987 5$ coins ever circulated. This is still a large -near a million- coins that reached circulation, but when compared to the over 100 million coins from the other two years they certainly become scarce and rare to find.

So I take a look at the date and guess what: 1987. The cherry on top of a bag which had already given me a Jersey penny. And, of course, the cherry on top of the day.

Let's use this thread to share that surprise coin that makes a whole bulk buy worth it.

I've had plenty, I once got two of these from a $10 bulk lot

https://en.numista.com/catalogue/pieces12500.html

Last month I bought about $150 of world coins from my local coin shop's bulk bins (handpicked for mostly pre-1950, so not really random bulk per se). Among the coins were a Germany 1917 zinc 10 pfennig (catalog value about $90), Germany 1888E 20 pfennig ($35), an apparently uncirculated Jamaica 1947 penny (catalog value $25), and Britain 1913 penny in XF ($25). So with three or four keepers alone I made back my entire purchase price in (hypothetical) catalog value. And there were quite a few more exciting keepers like that, too!

I love picking through bulk lots like that (especially when they come from collection dumps). It's like treasure hunting!

I have purchased many bulk lots over the years, and found many cherries along the way.

Among the best

BU 1966 Korea 5 Won...Sold this one for almost the $90 I paid for the lot
VF 1860/57 Sweden 2 Ore
F 1860 Beaded Border British Penny
VF 1870 British Penny
VF 1875 CS Denmark 1 Ore Available for swap
XF 1882 CS Denmark 1 Ore Available for swap
VF 1888 CS Denmark 1 Ore Available for swap
VF 1874 CS Denmark 5 Ore Available for swap
VF 1907 VBP;GJ Denmark 5 Ore Available for swap
BU 1883 India 1/4 Anna

I recently purchased a group of 35 NY transportation tokens, in the group I found this one which lists for $60 (more than I paid for the whole group):


I also found a NYC subway token error, it was already a tough one to find, and this one doesn't have the large "Y" punched out of the center.

I want to know where people get bulk lots (in US). I know someone gets there's from a company that has something to do with black mountain i think, but I wonder if you ever get enough back from your source to make it worth it, or do you get them expecting to lose money on them?