If you buy a lot of box sets, you probably already know POPmarket. The site routinely offers great deals on CD and vinyl packages, as well as other types of tasty musical bundles, and they were nice enough to give Diffuser and our sister site Ultimate Classic Rock five copies of Queen's new 'Crown Jewels' box set. And since one good turn deserves another, we'd like to give them to you.

Enter via the widget above for your chance to grab a copy of this amazing collection. 'Crown Jewels' collects the first eight Queen studio albums -- their self-titled debut through 'The Game' -- in a lovely blue velvet box. Also stuffed into that pretty, fuzzy case is a 92-page booklet, complete with lyrics, photos and liner notes by Matt Pinfield. There's even a reprint of the rare "Nude Bicycle Race" poster.

Launched in 2010 and beloved by music obsessives for offering deep discounts on boxes, most notably through the 24-hour "Daily Deal" special promotion, POPmarket is the place to grab great sets like 'Crown Jewels' for not a lot of scratch. While we recommend bookmarking the site and checking back daily, this contest is your chance to snag some choice operatic rock for zero dollars and zero cents -- the nicest price possible.

The way our widget works, you can increase your chances of winning by sharing your entry across Facebook and Twitter. The contest end at 11:59PM EST on Oct. 21, 2013. Before you enter, read our official contest rules and POPmarket‘s privacy policy. Good luck!