I have been trying to sell pets to specific players that I purchased from them using their user ID number, but it doesn't seem to be working. I put their user ID number and a sale price into the correct slots on the pet profiles, but they have all said that the pets are labeled as not being for sale. I have done this before and it has worked, so I do not understand why it is not working now. Any ideas?

You've double checked that you've input the right player ID to the right slot right? If you're still having problems, I'll suggest you screenshot what you've input into the sale box of the pet, and post it in the bug forum. With all the errors going on recently, it'll probably be good for an admin to look into it.

Double and triple checked, but I will try the screenshot idea. Thank you!