Consumer electronics, computer components, audio and home entertainment. Prices in this category move week to week, which makes the Deals of Today page more useful here than a discount code — the same TV can swing further on a weekend promotion than any percentage code would give you.
Where codes do exist they tend to be narrow: a fixed amount off one product line, or free shipping on bulky items where shipping is the real cost. Open-box and refurbished stock is usually excluded, even when it is listed alongside new stock.
Price-match policies matter more than coupons in this category. Several of these retailers will match a competitor price on request, which is often worth more than the code you were about to apply.