There are definatly risks with eggs as well. I've only ever bought or will buy from someone known to have good bio security measures in place and a good healthy flock. It's one reason I've persevered with the breeder I have rather than just grabbing some eggs off gumtree.
For sure appps. I do a lot of research and ask a gillizon questions before I buy posted eggs. I prefer to buy eggs where I can go pickup and see the flock but in the case of the last lot of Belgian eggs I just bought distance can sometimes be a problem. It would have cost me double in fuel to pick up and I got them over night.