Wayfair’s sales are pretty legendary for both the sheer volume of products and for the discounts involved. Now you can shop the home e-retailer’s 4th of July Sale, which includes huge price cuts — we’re talking up to 60{6b977529af4b490fe19a3f85472c6203ccfa467a56646e317a890c6580e8b827} off — on bedroom furniture, mattresses, …