NEW YORK (MainStreet) – Health and nutrition retailer GNC is currently taking 20% off all of its store-brand items, including protein powders and vitamin supplements, when you place an order online through its website. The discount, which is good today only, is taken automatically when you add the items to your cart. It does not combine with other discounts or promotions and shipping is free if you spend more than $99.

The Amazon MP3 Store has discounted the soundtrack to Tron: Legacy to $3.99, which is marked down $1 from when I bought it in December and is a discount of $18.78 if you consider the cost of buying all the songs individually. The soundtrack was composed entirely by Daft Punk, and includes an Amazon-exclusive track and a digital booklet.

Daily deal site DailySteals.com is offering a “spy watch” for $24.99, marked down from $129.99. It features a digital camera and built-in microphone for taking pictures and recording video, can store up to 8 GB of data and connects to your computer with a USB cable, which is included. The deal is good until tonight at 11:59 p.m. EST.

Don't want to spend too much? Check out our Deals & Steals hot topic for more bargains. Don't want to spend anything at all? There's plenty of Free Stuff to be had as well.

Matt Brownell is a staff reporter for MainStreet. You can reach him by email at matthew.brownell@thestreet.com, or follow him on Twitter @Brownellorama.