Trade BB Guns for Ammo in Tucson, Arizona For Sale

I have a big box of BB guns my kids have outgrown. Would like to trade them for some ammo. Here's what I have:
--Thompson SMG Airsoft (I think it needs a seal) (6mm Airsoft BB). Buttstock and drum mag are removable. This is a very cool piece.
--Uzi Crosman Model Z77 with folding stock (CO2/BB)
--P-38 Crosman Model 338 (CO2/BB)
--Python Crosman Model 357 (CO2/.177 Cal pellet)
--Marksman Repeater spring piston model (looks like xxxx) Have two of these. Both
complete but currently disassembled. (BB and .177 Cal pellet)
--Power Line Model 722, big side pumper target model (needs seal) (.22 Cal/5.5mm pellet)
There's several hundred dollars worth of stuff here, but they need some TLC.
Ammo I can use: .308, .357SIG, .45ACP, ,40S&W. Will of course consider any other calibers.
Prefer to trade the whole lot of BB guns vs one at a time.