Feeler 8 cockatiels plus cages

As it says. I have 8 cockatiels plus one large cage and 2 smaller ones. I have a female that has hatched and raise 12 young ones. seperated her so no more babies lol. Anyway Im putting a fealer out to see im looking to trade these for a large tank with stand or a couple tanks. Im not shure how to price. Id have to get rid of them all if I do this. Thanks and lmk