Depending on the time of year and the breed they can catch 15-20 each in my area. Something I have learned in putting many ads for layers, chicks and fertile eggs on CL, DO NOT allow people to haggle, Be honest and up front in your listing, be firm on your price, If you want give discounts for multiple sales that's great but DO NOT sell yourself short. You have taken the time to raise and feed these birds.
I had listed several 3.5 month old pullets for sale, I listed them for $8 each or 5 for $25. I had someone email me wanting to take all 12 but would only pay $3. each.. I refused and got a nasty Email from this person telling me that if I was selling then they must not mean that much and on and on... I didn't respond but sold all those pullets within 48 hours.