Airsoft 50BMG read description plz!

I got 2 AirSoft 50BMG both work one works better then the other I have 2 tan and 2 black mags for them no cases I don't ever use them they are just taking up space and I want them gone 400 for the one with the tripod 300 for the one with nothing but the mag $40 extra for the other two black mags