Signed Elantris Tenth Anniversary Leatherbound in stock. Should I buy? Will I get another chance?

I’m relatively new to buying Sanderson’s books irl. I have the oppurtunity to purchase several nice non-Sanderson leatherbound books and an omnibus I’ve been eyeballing. However should I purchase this Signed Elantris Tenth Anniversary Leatherbound instead while its in stock or could I wait? I mean how often is this in stock (a signed version that is) or is this just a short term thing I need to pounce it on soon?