I have 199 pieces (started with 200, so I lost one or miscounted) of Federal 300 rum as follows:
1 sealed bag of 50 new, 1 unsealed bag of 50 new, 25 new cases prepped (run through sizer, chamfered) and primed with 215M for total of 125 new. Plus, 74 fired cases. I do not recall using them more than once, but some may be 2x fired. I bought these a year or two ago when I could not find the Nosler I normally shoot, and may have tested how well they bounced back after firing once by twice firing a few.
New these cases go for $60 per 50. I don't mind having them on hand in case there is a shortage, but I'd sell the whole lot for $215 shipped priority mail.