I so agree with this. Unless you are giving them to someone you know (or at least know their reputation with animals), I would definitely list them for sale. That way, only someone who is serious about them may reply. I have often listed a bird for sale and ended up selling at a reduced price at pickup because it was evident during our correspondence that the person would care for them properly. I even list my extra cockerels for sale on the FB groups or Craigslist. This is the only place I have ever offered any bird for free.
I know it sounds like $30 is a high price for a 5 month old pullet, but have you charted and calculated the cost to raise them to that age? You really might be surprised. I feed all organic so my feed bill is inflated, but just in feed I average $5 per bird per month. That doesn't include any costs such as building materials for housing & repairs to existing structures and watering systems, and anything else you buy such as bedding, ACV, wormers, etc. I don't even take into consideration the time I've invested because I enjoy it so much. I definitely don't make a profit and wouldn't make it as a business, but I try to recoup at least some of the feed cost.