Once you've narrowed it down to the features you want/need then figure out which brand and model is best for you. Then shop for prices using comparison shopping.
After you get to that point THEN go see if the stores have discounted models or scratch and dent ones on hand.
Don't buy a particular one just because it is heavily discounted. Too often you will get more features than you want or need or miss features that you really rely on.
When I was buying appliances for our house I found the best deals at the Sears appliance department in their April appliance sale - got 20% off four appliances, $500 rebate on two of them, then an additional 10% off when I got a quote for the same models from a local dealer (who was a friend of mine and who could not have gotten me the refrigerator/freezer combo without getting three of each). (Got refrigerator/freezer set, wall oven and dishwasher.)
I got the washer at Lowe's for50% because it was badly dented on the lower front panel, the matching dryer at Rex Appliances for 40% since it was the discontinued floor model that they were going to have to get rid of soon.
The other two appliances - cooktop and light/vent - I got from IKEA when I ordered my cabinets. With two appliances the cabinet order was 20% off. The appliances were not supposed to be discounted but since my order was so large, they included them in the discount.
The microwave I had to buy Christmas Eve (since my almost nine year old one quit the Friday before Christmas) was a deal that had started on Black Friday but that Home Depot had not sold all of. It was30% off. While it would not have been my first choice, it was the best available that I could pick up that day. Most of the rest were much more expensive or had to be pre-ordered for delivery later. This one cost $80 - the one it replaced was $50.