I haven't been to an expo in years but it shocks me to think of anyone selling such snakes (sick ones, with RI's?) at an expo, & personally I'd also be complaining to whomever was responsible for putting on the expo. RI's (or other illnesses) are contagious, so knowingly bringing sick animals to such a gathering?There's just no excuse for that, IMO. If mites can get shared at these things, so can viruses etc.
Physical defects are another matter, but still? How sad, & it sure doesn't give a good impression, does it?
And as bcr229 said in above post, buying a snake with an RI as a "feeder"? No way that's a good idea, ever.