I have no idea about pricing on this particular version. You'll have to enlighten me.
It turns out I really did have no idea. Please read comments below. Credit to BananaMannn & mcek.
Sorry, late night :(
GET YOUR MICROSOFT OFFICE KEY INSTANTLY AFTER PURCHASE!
ONE HOUR DELIVERY
OFFICE PROFFESSIONAL PLUS 2013 ORIGINAL LICENSE KEY AND DOWNLOAD LINK
CAN BE USED GLOBALLY ON ANY OFFICE PRO PLUS 2013 LANGUAGE VERSION
LICENSE KEY FOR ONLY ONE COMPUTER and CAN BE REUSED ON THE SAME MACHINE
THIS IS AN ACTIVATION KEY WHICH MEANS YOU MUST HAVE OFFICE PRO PLUS 2013 INSTALLED IN ORDER
TO ACTIVATE WITH THIS KEY, IN OTHER WORDS, YOU NEED FRESH INSTALLATION.
ENGLISH VERSION DOWNLOAD LINK WILL BE GIVEN WITH PURCHASE ( for other language versions you need to either have the installation CD or find the language version you need using a search engine!)
According European Union selling used software IS LEGAL. http://www.macworld.co.uk/news/mac-software/resale-used-software-licences-legal-eu-court-rules-3367799/