I'm sorry that I can't answer your question regarding alternatives to the CRP-5 but I can say that it is highly unlikely that you will find one in the USA. Unless you have someone coming to visit you over there who could bring one out for you, I'm afraid you'll probably have to pay the shipping from the UK.
As for re-selling on EBay, I've seen them on there for over £50. They actually have pretty good resale value as if you need one for studies, paying anything less than £72 for a new one is a bonus!
Matthew