Hi,I have bought lots of eggs off ebay from lots of different vendors and have generally had fairly good results 50% +. The couple of times there have been a problem the sellers have been incredibly helpful and have sent replacement egg straight away.
The worst eggs I ever bought were from a local person who sells them as part of a business,I emailed them to inform them of the poor hatch rate the said yes we think roger there cock buff orpington was getting a bit over weight so they even new.£24 for a dozen mostly infertile eggs what a rip off.
Graham.