I have a bunch of 37mm once fired practice shells. Was hoping to get a launcher but not gonna happen now. They are good thick plastic and shorties at about 1.5” Is there a market for these, and if so what is a good price for them? Update, they are 40mm. I bought them at least 15 years ago and never checked them. I know I ordered 37 and assumed they were when I got them. Anyway, I have 150 of them that I can’t use.