Just my casual impression, but it appears to me that as Ebid is UK based, the majority of buyers and sellers are in the UK. So yes, probably would have more sales.
IMO, Ebid will not take off in the US as long as sellers are being told they need to be willing to ship overseas to be successful. The paperwork is a PITA and therefore I choose not to do it; e.g., I don't ship overseas.