Depends.
7 digit or lower, pretty valuable, hang onto that, contact a old dragon colecting forum post.
lowish 8 digit, iffy. Depends on who you ask.
Edit: If it's a 6/5 digit you've got yourself a walking goldmine
Speaking of Fr Tumblr's....
I have one called (you guessed it) Alfamangle where I ocassionally post art.
There's another called GimmieThemPrimals which I enjoy
Ahem
You get 1 free flight change and you can only change every 6 months, if you haven't used yours you can change for free, it's just showing what you would HAVE to pay if you want a trip back home.
I need motivaion to write my fanfic so... yeaaah
If you wana read my bad writing and some editing by a friend, see here: https://www.quotev.com/story/11859141/Storms-Path-WIP/1