Thanks for the questions!
1. Magic!
No, to be honest, they were bought with an exploit that another user discovered many years ago allowing a user to purchase multiples of unique items, which was patched almost as soon as it was discovered. However, the only talks about the exploit during the short time it was known was about buying multiples of birthstones since they were supposed to be limited to one per account. Therefore, when the exploit was patched staff went through and removed the birthstones from users who had more than one of that month's stone. However, since I was probably the only user that decided to try it with mailboxes instead of stones for whatever reason, I guess they managed to slip through the radar. I sent messages to a mod and an admin regarding them after the exploit was fixed, and while I was told I could keep them for the time being, they also said there was no guarantee that they wouldn't be removed in the future. However, given that I've revealed that now, I wouldn't be surprised if they were taken from me at some point in the very near future!
2. My profile pic is of the Pokemon Buizel. Buizel is my favorite Pokemon by far, and I'm currently beyond obsessed with him for countless reasons. I came across this super cute picture of him fairly recently and decided to crop it out and try it out as my avatar for a bit just to see how I liked it as such.
Here is the image it was taken from.
3. My favorites are both blue and orange, and I love just how well the two colors go together too.