357 Sig ammo

I have about 200 rounds of 357Sig ammo, looks like a 357 case that is smaller at the top with a smaller round, I want to trade or sell. I don’t have a pistol in that caliber.

I’d like to trade for a good inshore spinning reel. Figure the price would be near $130 for the rounds, will take a less expensive reel even trade or a little cash with it for a better reel.