I would take it, if it meets the mustard. Give it a good sweeping out. Ask how long it has been that it had chickens in it. If it has been empty several weeks, I would not worry about disease or parasites. Those pests and germs need chickens to live.
A good sweeping out, add good bedding, install birds.
A couple of things to check, not all buildings are good for raising chickens, but people have put chickens in them, and to be honest, most do just fine. I knew a lady that kept her chickens in an old car. I was kind of appalled, but to be honest, it did not seem to bother her or her chickens. However, do look at ventilation, which is pretty easy to add. Do make sure the roosts are higher than the nest boxes, which generally is easy to adjust.
Personally, I have had both, and I would much rather have a coop that I can walk in. I do not like the elevated box that is only 4 feet high (or there about) I found it difficult to clean, difficult to get birds out of if I needed to handle them.
Mrs K