Step 1: Using Your Eyes
Okay, so you've found the dragon you want, and you want to message the owner about it.
STOP! Do not message them immediately!
First, check for any notes, rules, etc. that would apply to the dragon. For example, tab descriptions, clan biographies, dragon biographies, and linked FAQs in clan bios are common places where you would find this information. Check this short checklist below for whether you should ask for the dragon at all.
Does the dragon's biography say anything about it not being for sale?
Does the description of the tab the dragon is in say anything about the contained dragons not being for sale?
Does the user's clan information say anything about dragons not being for sale? If so, does anything they specify apply to the dragon you want?
Does the user have a linked FAQ or anything similar to that in their clan information? Does that say anything about dragons not being for sale, and does it apply to the dragon you want?
If the answer to any of these questions is "Yes", do not message them about the dragon! There's nothing more annoying than getting messages about buying dragons that are clearly not available, and it's extremely rude to just ignore what people have written.
While some people may make exceptions, assume they won't and leave them be.
If the answer to all of these questions is "No", we're on a good track! However, this doesn't give you the green light immediately. Move on to the next checklist.
Does the dragon have apparel?
Does the dragon have a familiar?
Is the dragon level 25 and in a coliseum team? (If it has the
icon on it, it is)
Does the dragon have art or lore?
If the answer to any of these questions is "Yes", you probably shouldn't message them about the dragon. It's probably a permanent dragon they don't want to get rid of. Exceptions exist, but trying to buy it isn't recommended.
If the answer to all of these questions is "No", good news! The dragon might be available! Move on to the next step.