I've done both as well, although the times (3) we bought bred mares they ended up open... through no fault of the sellers. They both tried to fix the situation. The first, they went on vacation, so we hauled the mare pretty soon after she was bred. Hauler truck broke down (for 2 days!), and yep, she ended up open. Since I live in a different state than the seller, I chose not to send her back. I had just bought a stallion specifically to breed to this mare, so that was a big factor in not sending her back as well. The other one had a foal at side when we bought her, and she just didn't breed back. She's older too, and we are still trying to get her bred. The third was with a maiden stallion, and well, he just didn't figure things out fast enough for her! Now, sending mares out to be bred is something I will only do if I know the stallion owner VERY well. Actually, I've only sent my mares to one breeder, a very good friend of mine, and my mentor. I have no problems sending mares to her, but to anyone else I would think long and hard about it. I just don't like the idea of sending my girls off to be cared for by someone else. Besides, I miss them while they are gone!