Hi! Maybe it is not relevant for you today, but I strongly recommend you or smb else not to trust strange surrogates! You can lost money and hopes. You can read many posts in net about cheaters. There are a lot of clinics with good prices. I was in Ukraine, there are no waiting lists like in GB, but they propose low prices. They control all the processes. You can be sure that your SM is healthy and your future child is safe. Think about it and save your time and money. In Ukrainian clinic there are good low cost packages. They propose you accommodation, food and medical procedures for single price. Of course they (biotexcom) also have their pros and cons but it worth to try.
Personally for me, I would rather go through a clinic. That way I am confident of the various things mentioned by PrincessD. In fact we have been in touch with BioTexCom for surrogacy. We really liked the prices and the fact that they offer all surrogacy contracts with unlimited attempts. Good luck to you!