HTC is giving One-series fans a terrific reason to pick up the latest model this week.

For a limited time only, those who purchase a One M9 through the company’s online store will get a brand new Nexus 9 thrown in free.

Both devices are looking a little long in the tooth new, especially with the HTC 10 right around the corner — but at just $649 for both, this is a terrific bundle for those who don’t care whether they’re getting the latest specifications.

You’re actually saving $399 in total, but you only have until 12 a.m. on March 23 to take advantage of this deal, so you’ll need to act fast. HTC also states that only four bundles can be purchased per customer, though we’re not sure why you’d want so many.

With the One M9, you’re getting a 5-inch 1080p display, a Snapdragon 810 processor, 3GB of RAM, and 32GB of expandable storage. It also packs a 20-megapixel rear-facing camera, a 4-megapixel front-facing camera, and stereo speakers with Dolby Audio.

The Nexus 9 packs an 8.9-inch display with a 2048×1536 resolution, NVIDIA’s dual-core Tegra K1 processor, 2GB of RAM, 16GB of storage, and a 6,700mAh battery.

• SourceHTC