I haven’t seen any announcement come through from any source, but it appears that Rush’s “Moving Pictures” and The Cars’ self titled debut “The Cars” albums are currently on sale over on Xbox.com.

“Moving Pictures” is typically priced 880 MSP ($10.99), but is currently marked down to 440 MSP ($5.50), and contains the following songs:

The Camera Eye

Limelight (Original Version)

Red Barchetta

Tom Sawyer (Original Version)

Vital Signs

Witch Hunt

YYZ

“The Cars” is typically priced 1,200 MSP ($14.99), but is currently marked down to 680 MSP ($8.50), and contains the following songs:

All Mixed Up

Bye Bye Love

Don’t Cha Stop

Good Times Roll

I’m in Touch with Your World

Just What I Needed

Moving in Stereo

My Best Friend’s Girl

You’re All I’ve Got Tonight

Update 1: Looks like there are quite a bit more packs that are also on sale…

Update 2: Official word from Rock Band now explains the sale, which runs through January 11th on the Xbox 360, and from January 11th through January 25th for the PS3.

Nine Inch Nails Pack 01 – 240 MSP

March of the Pigs

The Collector

The Perfect Drug

Oasis Pack 01 – 240 MSP

Don’t Look Back in Anger

Live Forever

Wonderwall

Weezer Pack 02 – 240 MSP

My Name Is Jonas

Pork and Beans

Undone (The Sweater Song)

Evanescence Pack 01 – 240 MSP

Bring Me to Life

Call Me When You’re Sober

Weight of the World

The Police Pack 01 – 240 MSP

Can’t Stand Losing You

Roxanne

Synchronicity II

Jimmy Buffet Pack 01 – 240 MSP

Volcano

Margaritaville

Cheeseburger in Paradise

All That Remains Pack 01 – 240 MSP

Chiron

This Calling

Two Weeks

If you’re interested, I wouldn’t wait too long. Unexplained discounts like these usually don’t last too long.