I just discovered a big pile of 1st issue slot cards from the Midway Slots from Harrington Raceway in Harrington, Delaware in a collection I'm currently going through. These list for $15 in the Slot Card Guide but I'd be willing to sell them at $5 each mailed anywhere in the USA in a standard envelope via First Class Mail. I have over 20 1st issue cards available with different names, etc.

I also have some 2nd issue cards with the two different length dotted lines at the bottom on the reverse. Those list for $7 so I would sell those for $3 mailed. Email for details if interested.

Here's a scan of the 1st issue card....

And here's scans of the two different 2nd issue cards...