Assuming this is just range brass? The 357 brass will sell and probably quickly, last time I bought 38 brass I paid 3 cents per piece shipped so you might be better trading it for something you use even if 2-1 or something. I only bought because it was cheap, I have thousands of pieces of 38 brass I have loaded well over 20 times and no issues, eventually they will split or start to split and those get tossed and the rest make another trip to the range. The 7 mag will sell too, I would be down for a couple hundred same headstamp if priced right, I would weight sort, anneal and roll with it. I bought a bunch of Winchester 300WM once-ish fired range brass a few years ago, did the same thing and it shoots really well. I think it ended up in 3 batches of +/- 2 grains or something, it's in my notes and brass boxes somewhere. I culled maybe 20%?