I want to sell my zebra finches at a bird sale, but…?

Find out how much they sell for in pet stores. I hope you have extremely large cages for them since they are active birds and they need a lot of room. I had a cage that was so large I could stand inside it to clean it and it was home to four or five birds. The more birds you have the larger the cages - or have more cages. You could also consider selling them to pet stores.