No! No! No! How do you know the tires are in great condition? Never buy a used tire. It is a loosing proposition. You will loose more than you gain. Don't waste your time with used tire.
I understand your concern. A bad used tire sometimes is hard to identify, but if you know the source and have some tire inspection knowledge, it is doable with limited risks. I agree it is not for everyone, but in my case, it saved me about $200 for 4 tires, after adjusting the shorter thread life on used.I think it worth the risks I take.
I think it is a excellent way to get a set of tires If you have time look around. Tire shops are not the most fun to deal with and sometimes new tires can give lots of grief! H