Whirlpool Stainless Steel Double oven Gas Range Stove

30-inch stainless steel gas range with a double oven five-burner cooktop Pullout rack, total 3 oven racks included - range is used, so it has some wear and tear, but it functions perfectly well except **2 knobs (for both back burners) which do not turn and need repair/replacement** - I'm asking $180, which reflects its the necessary repair, which I would do myself but because it's a gas appliance I don't want to risk it