I agree with Mrs B, about the pros and cons of taking on exbatts as first chickens. Yes they have lovely personalities, which will emerge as they become used to their wonderful new life, and since they're bred to tolerate crowded conditions, they're naturally tame, generally not flighty or aggressive. Yes, you will get some lovely eggs, maybe for a year more, or even longer if you're lucky, bearing in mind that they will come to you on the verge of middle age and will have been bred and fed to produce very heavily in their short 18-24 month lives before you get them. This will inevitably take its physical toll, otherwise the farmer wouldn't be getting rid of them, would he? Expect that egg quality will steadily decline, with wrinkled or soft shells. Also, exbatts are particularly prone to painful, distressing and fatal abdominal problems arising from intensive egg laying in early life, such as prolapse, and peritonitis, which is when a soft egg breaks inside the hen, or goes down the wrong way into her intestines and festers there. If you are prepared for this, you will need to learn to recognise the early signs of trouble and be prepared to cull the hen promptly, or take her to the vet for euthanasia, to save her from further pain and suffering.
Personally I always get point of lay hybrid pullets at 16 weeks old, who then settle in for a few weeks before starting to lay and would strongly recommend this to people starting out with chickens for the first time. I get the benefit of all their best seasons of egg laying, and have the satisfaction of knowing that they've always had the best conditions and treatment that I can give them, and as a result they all seem to live long, healthy and productive lives. My oldest hen is 6+ years and still laying regularly, because they are all free to take a break from laying for a few weeks over the winter, as is natural to them, instead of being forced to lay under relentless electric light in an intensive unit. I get a mixture of breeds which adds variety to the run and as they all lay different coloured eggs, I know who has laid and when. I feel that the extra years of quality life I give them outweighs the benefit to the exbatts I might otherwise have kept, and certainly I get more rewards for longer in the form of the quality of eggs they produce for me and the trouble-free nature of their care. The personal feel-good factor to a keeper of seeing a run full of happy hens is equal wherever they came from, in my opinion.
Just a personal choice, of course - but it's right that you should have the possible downside spelt out, I think, so you can make an informed choice. Just one more point - when it comes to the day when you collect your hens, wherever you get them from, you will probably want more than you can really accommodate. Do remember that what hens really need more than anything is enough space. A coop with a small attached run is never going to be able to accommodate the number of hens which will fit into its coop. All of the experienced keepers on here will agree with me that hens need a minimum of 2 sq metres of run space each, so they can move around and escape each other into some personal space, and this means giving them a much bigger run, preferably walk-in, and with a free standing coop, if you're not able to let them free range for most of the day on an area of grass which can be rotated once they've destroyed all the vegetation on it. Small runs stress the birds, and also get really filthy in no time - hens poo an enormous amount and you need to be able to get into the run to poo pick at least once a day, which is difficult in a small low run.
They will tell you off soundly if you are not taking the poopies out of their house quickly enough! 
