Last week Led Zeppelin fans celebrated the band’s iconic fourth album’s 40th birthday. If you dusted off your original vinyl copy and bought a new needle for the occasion, one thing is for certain: you’re getting old.

Many fans however took advantage of special pricing for the album set for the occasion, moving the package into the Billboard 200 for the first time in 25 years.

The album, commonly referred to as ‘IV,’ spent four weeks at No. 2 upon it’s release in 1971, but according to Billboard.biz got only as high as No. 166 this time.

That’s a 273 percent sales increase however, most likely the result of being offered at a special digital price of $5.99 through Amazon.com and $6.99 through iTunes.

The eight songs are still somewhat of an oriflamme for everything rock ‘n’ roll should stand for, and if you’re interested in learning more about this landmark album you can check out our list of 10 Things You Didn’t Know About Led Zeppelin IV.

In fact, between that and our video rundown featuring cover versions of every song from the album, we’re going to pretend that we played a microscopic, miniscule role in this new chart success. Hey, it’s Friday. We’ll take any reason to celebrate that we can.

So raise a pint to Led Zeppelin this weekend. We’ll be billing our new intern, Melvin Van Nebula.