I understand the "I can't leave it lying there" thought process. Many of us are "brassaholics" and cringe at the thought of leaving it lay, or turning something in for scrap that someone could use.
At some point in time you will reach storage capacity. Your choices will be, stop picking it up ( "but I like picking it up"), start throwing it away, (yeah right), give it away, (to who?), scrap it (if there is a local scrap yard nearby that will take it), or sell it.
Selling it is work, your financial situation and available time dictate how much effort you want to put into it. You have zero dollars invested in it right now. Least effort is to fill a postal MFRB and sell it as bulk mixed brass. Say a $1 a pound (probably 30-35 lbs in a box) plus shipping, $45-$50 a box is my guess. Probably less than scrap price but your sharing your good deal so a bit of positive karma. Pour it in a box tape it up and put the address on and off to the post office.
Do you have kids, grand kids, neighbor kids you like? Let them do the sorting to earn some cash.
You will have to up your post count to sell in Swap and Sell, that's really not that hard to do.