"Nirvana Nevermind Super Deluxe Box Set" @ Pop Market - additional 10% off with code for $84.99 + free shipping
The super deluxe version of this album comes with 4 CDs and one DVD. About half the material included is previously unreleased. I'll spare the copypasta of the album description, but suffice it to say that it's a good buy. Especially at this price, as Amazon has it for around $140 right now.
Use the coupon code "facebook10" and they'll knock 10% off. I got this for $76.49, which is an absolute steal.