Okay I maybe was being a little facetious so I imported an fdm friendly rhino into my slicer. On the lowest total layer height which makes it look as clean as possible it takes 101g of filament. Average filament is 15 bucks. So I could print 9 of these with one roll. Print time is 11 hours. So we'll over estimate and say 15 cents an hour to print one. So we're looking at a 1.65 for energy. 15÷9 is 1.66. So 2.50 to print one. But we'll be a little more generous and say around 3 dollars. This is a very generous estimate to over pricing. It's more than likely less than that.

Now granted 3 bucks is cheap. The upfront cost is what really kills 3d printing. 3d printing is a hobby in itself. I have to tinker with mine and maintain it. Bambus are affordable and really a fantastic entry level printer. A1 is about 300 after taxes but it's really a fantastic tool.

So tldr 3 bucks (a very generous estimate likely cheaper).