We don't buy much in the way of prepared foods in my house, but food prices in general seem to be going up a bit.
Even as a single guy, you can save real money (and eat much better) if you do it right. When I was single, I used to buy sale meat in bulk . I also used to cook certain things in bulk and freeze the leftovers.
As a general rule, anything in a sauce or other liquid will freeze and reheat well. Stews, soups, pot roasts, homemade red sauce with meat, chili, etc., are all great things to cook in bulk and freeze in single serving portions. Meatloaf reheats pretty well too. You just need a good storage container set.
Some things don't reheat well, like steak, bone-in chicken pieces, pork chops and hamburgers. Those you can still buy in bulk and freeze in single serving portions so that you can cook smaller amounts. All it takes is some good freezer bags and the willingness to break down larger packages of meat when you get home from the market.
Finally, some things don't reheat well in the microwave, but can still be cooked in bulk and then turned to other purposes. Roaster chickens and bone-in hams are two great examples.. Today's roaster chicken, with pan made gravy, becomes tomorrow's chicken soup. Today's bone-in ham becomes tomorrow's cold ham lunch sandwiches, ham hash and, of course, lentil soup.
Have some fun with it Papi.