The project was done all in OpenSCAD.  This is a remix of the project here.  I modified the OpenSCAD code to make it only for the base set, and took out some unecssary and confusing variables.  I also removed the Latex hack and the labelPlate() they mention in the post due to them being complicated or uneeded.

This container houses the 6 main cards needed for every Dominion game: Copper, Silver, Gold, Estates, Duchy, and Province cards.  The box has multiple options to customize the box tolerances, how much of the card is showing, labels and cost written on the side of the box, and a lot more that probably aren't too necessary.

The main thing with this print is that the tolerance for the Copper was a bit tight due to mine being a bit worn.  You may need up to up the slotYTolerance up a bit.  All of the options are customizable in OpenSCAD.  The price to print this for me was around $1.94. (97g for 20$ per 1kg filament) The base card set from Dominion (with cards included, I had my own) is priced around $19.99 or $12.99 normally.  This is a savings of 90% full price, and 85% on sale.  It does included 4 more cards (trash, colony, platinum, potion) but that can easily be added by copying the format in the OpenSCAD code and adding the other cards to the slotConfiguration variable.

I printed the files seperately due to some of the printer had some stringiness form the extruder jumping between the two objects.  For that reason, you may want to hide either piece and then export it in OpenSCAD.  The .stl files included will be the pieces seperately, and the OpenSCAD file will include both.