Groupon time, especially if you have gift certificates or store credit! Good until the end of day today (2/10/16) coupon code EXTRA15 gets you 15% off Groupon Goods products, which are typically physical products (not services/vacations/etc). This includes Electronics (over 17,000 items) which includes Camera and Photo items (770+ items). Of those 300+ are in accessories of all kinds, and 300+ are in security cameras. There are around 45 digital cameras in two categories (DSLR, P&S). You can see all those subcategories on the left hand side of their website.

The coupon restrictions: you can use the coupon on three separate purchases. On each purchase, you can use the discount on one unit of an item (eg one item X, one item X, one item Z). There is no minimum purchase amount. The maximum savings from this promotion is $50 per deal. Typically you can get free shipping with orders of $34.99 or higher (for items sold and shipped by Groupon itself).