I would not like that either, especially as my hens all free range. But, once we sell livestock or anything for that matter, its out of our hands what then happens.
I advertised some kittens last year - £20 each. Lovely white one among them, and a lady and little girl came. Ooh, yes, child loved kitten, they would take it. Came to paying, and mother said she had spent £10 on fuel getting here, so only had £10. Seeing as I may have been left with the kitten, I took the tenner, and anyway, could not say no and end up with a tearful child, could I?!!
Two weeks later, there was my kitten back on the internet for ....yep, £20. I did not phone her, because I was so angry, and may have regretted my outburst. What was worse, it said, wormed, deflead, etc ....yes, it was, because I had told her I had done it, so she did not have the outlay for that, did she!!!