Once fired indoor range brass, unprocessed : r/reloading

I found a bunch of primed 9mm brass in an abandoned rental but the brass looks dirty. Would it be safe to send it? : r/reloading

An introduction to reloading - Part 4, Norma Academy

R-P Once-Fired Brass

once fired bulk indoor rifle brass for reloading in stock free shipping tumble cleaned polished

380 Auto Once Fired Brass for Sale

Once Fired Brass from Factory Loaded Ammo • Enough Gun

45 ACP Raw Unwashed Range Brass 250 Count by Once Fired Brass

223 box of 500 Range Brass – H&H Shooting Sports

Reloading Brass

6.5 CREEDMOOR once fired HORNADY Brass 50ct bag - Choice Ammunition

Once Fired Brass - Australia

30.30 Once Fired Brass, Mixed head Stamps 125 count - Once Fired Brass, Gun Parts

Once-Fired Brass - 9mm, Cartridge Cases, Shooting Stuff

380 ACP Once Fired Brass Mixed Headstamp 500 Count Raw Unwashed by Once Fired Brass