If you recently picked up a Canon digital SLR this holiday season and have started to look into future lenses and accessories, Best Buy has a good deal on an external flash you might be interested in. Until January 10, you can order the Canon 420 EX II on sale for $242.99 after using the promo code extrasavings at the checkout. Normally, you're looking to pay close to $400 for the unit so getting it for sub-$250 is a really good deal. Quantities are sure to move quickly so you'll want to hurry up if you hope to score one.

Though its MSRP might be a bit inflated (closer to $320ish), this is still a good deal on an external flash. Though most will be content with the built-in flash of the camera body, a stand alone flash really does make a big difference in terms of picture quality and, of course, lighting. Again, camera accessories rarely go on sale so this would be a great time to pick it up if you're in the market for one.

The deal is live now but only until January 10. Shipping is free though online units seem to be sold out at the moment. We'd recommend calling your local Best Buy for stock availability.

Thanks to jtking for sharing this one with us.