I would be in for 100 if that helps the numbers out. I too like the second one, it looks cast and not bent wire. If they are cast, the roller part is less desired to me than a normal buckle. I am really only interested in stainless, prefer medium shine.
Be aware, if you put your neck out a number of people may not come through in the end. I have seen this happen before on forums. Many will, but people do came and go. Also you should have a 10% mark up to cover your costs, you will eat a few dollars along the way, so you should not be loosing money.
Aaron