A.V.
I don't know about "local". I buy a lot of things online. Like from Woot! For two days, they were clearing their warehouse, so I got a bunch of stuff for cheap for Christmas. Or Modcloth - I stalk what I want til it's the price I want to pay. My anniversary dress, shipping included, was $20. I do like Kohl's and often find great deals there on kid clothes, especially end of season stuff. I am also a fan of Mabel's Labels and find their CS to be top notch, and their products are excellent. The whole family uses them. Oh, and I love IKEA. Lots of good stuff there, and it's a fun place, too. I can take DD for lunch and buy a few things (like kid toys or kitchen items) and make it an adventure. Or PetValu. I hit on them looking for a pet supply store that didn't sell animals. Every store has been universally friendly and well-stocked.
ETA: If you mean the deals from Mamapedia, I've been happy with the magazines and Mable's Labels. We have gotten several subscriptions for DD through Mamapedia's deals. I bought the yubo lunchbox, but don't think I really needed to spend that much on it. It's a fine company, but I find my use of the product isn't what I thought it would be. You couldn't pay me to use Totsy again.
A friend had a horrible time with one of those - might've been Living Social. So I avoid them. I have tried restaurant.com without a problem.