A brush guard changes the look of your truck and adds a layer of protection for brush or trail debris. Prices for a quality unit hover around $700, plus whatever you pay for labor if you aren't doing the install yourself.
You will often find the best prices during holiday sales or end-of-year clearance events when shops are clearing out old inventory. Aim to buy when demand is low to keep your total cost near that $700 mark.
Remember that the 0% intro APR is a window, not a gift. If you still have a balance after 15 months, the card will start charging interest on whatever is left over.