Thanks again chaps. I feel a bit of a muppet but kind of went along with it as this is all new to me. It just didn't seem right though especially when they wanted money from me. No harm done this time except for a few wasted hours but it's been an education. I can see how people could fall for this!
Much appreciated.
Great that you have asked first. You have already a clue now what they really are. I bet that they wouldn't do serious business with you having with your own terms.
But if they do, just ask them to send an upfront payment directly to your bitcoin address or go for an escrow.