It is almost valueless. My opinion is that yes, stick it into a bag or box, pack it away into a corner of the bench, and add whatever you get to it as time passes. Someday you will either buy a 9 or you will meet someone who can use it. Brass never loses value, because no matter how long you hold it, it is still worth about $2 a pound.
Just this morning I went to my local range. I was alone there, and fired a few magazines. As I was collecting my own, I kept noticing that there were more than I had fired. I wound up a few feet farther down the line, and gee, somebody had come up over the weekend and apparently fired about a thousand rounds of winchester factory and walked away from it.
I just stood there collecting that stuff for about a half hour, and carried away about a 3 pound bag. Now I have maybe 500 rounds of factory new brass to box up and set aside, to go with my probably 2000 rounds in rotation. Eventually, I got tired of getting to my knees and picking the stuff up and walked away with probably half of it left behind.
Want to hear a funny story? there is a range "officer" who volunteers there, and what he mostly does is wander around and pick up brass. He doesn't even bother picking up 9 or 40 anymore, it's not worth the effort. He sells the stuff, and seriously, it's not worth the trouble of bending down to get it.