sorry but i think if someone is looking for a yorkie they should already know about the breed BEFORE looking for one, its up to them to do some research first and then they wouldnt need someone on here to warn them this or that dont look right, yorkies are all colours and sizes full grown let alone when they are a pup, you just cant tell if its a pure bred or a cross by just looking at a pic. if someones looking for a pup no about the breed, colours, and sizes, then try to look for a pup that has those things you want but even then you still never know what you will end up with as a adult, if someone puts an ad up selling what they say is a yorkie and the ad doesnt say anything about a cross then why ask if its a cross? if it was a cross the ad would of said it was and if it is a cross and that person is not being truthful then asking them isnt going to make them admitt it.