Both appear to be barnyard mixes. My best guess would be a Blue Andalusian mixed with a Plymouth Barred Rock. In terms of worth, that depends on your location and the chicken economy in your area. I breed mostly exhibition poultry, but do every now and then end up getting some feedstore chicks (they give them to me when they become too much work or are not selling) and I raise them up and sell them to people that don't want to raise chicks but want started pullets and cockerels.
 
A barnyard hen, if laying, usually is $20 at my house. I usually sell started cockerels for $15 each, but it depends. One year I ended up with about 20 cockerels from a feedstore, most of which were just nasty and rude, so I was selling them for $5 for people that wanted to process them. But again, if you have a friendly cockerel that you like and are attached to--maybe stick to $15 or $20 to assure he is going somewhere that is keeping him as a pet and not food. It all kind of depends.