ok the fact of the matter is, 2 weeks is a long time for the RI to have come out. Shipping a snake and the stress associated with it, will weaken the snake's immune system, so if the snake was sick before shipping, I would expect the snake to show signs of distress after 3 or 4 days. Quarantine is not just to keep your old snakes healthy, but also to make sure the new snakes are kept at different conditions, they need to have higher temps for one, to help them cope with the stress of travel. Any new snake that I get will be housed at 90-95 degrees for at least a week to prevent any possible infection while they are susceptible.

2 weeks is plenty of time for the new snakes to have caught something from your snakes. Your snakes might not be showing signs of infection because they do not have a low immune system from shipping and relocation, but yes they might be the source of the infection. Also and very likely, the infection was caught during transport while the snakes were cooler.

Do you have the name of the virus? If you don't, you have no way of knowing it's incubation period, but most RI have an incubation period of less then 2 weeks, so I would presume the infection was caught after they arrived at your house.

THAT IS WHAT EVERYBODY IS TRYING TO TELL YOU. YOU HAVE NO PROOF THAT THESE SNAKES WERE SICK BEFORE THEY GOT TO YOUR PLACE, EVERYTHING YOU ARE DESCRIBING POINTS TO YOUR CARE, NOT THE SELLER.

I hope you understand now why we are all saying this guy is a good seller. Paying for vet bills for something that has a good chance of coming from your care was very nice of him.

For the lump on the head and the bleeding in the snakes, have you ever thought that the shipping company might be at fault? If you don't have a biopsy of the lump, and a confirmed cause for the bleeding, to me it sounds like your snakes had a very rough trip, and yes that would also make them even more susceptible to infections.

All of this is not to bash on you, just to make you realize that before you bash someone else, you might want to look at the facts more closely.