Ive seen something like this before with all the deformaties that go with it, people are just stupid buying into this.
A good friend of mine bought a Chi pup for well over 1K not a teacup but small
enough and rang me to say he was terrified he was going to step on it, I suggested buying a bell and attaching it to her collar. This worked but I wonder how many get stepped on and injured or worse.
my dad trod on my german spitz klein (not a teacup) as a pup, when he weighed only 1.8kg, and literally snapped both bones in his front leg in half. he had to have 2 ops and a tiny plate and pins. a large vets bill ensued but thankfully he is as good as new now but they are SO fragile and its so easy not to see them. if he was much smaller at the time im sure the outcome wouldnt have been as good