thats almost free and it doesn't occupy any time on your break. thats a good deal. couldn't make it in house for three times the cost im sure the in house dies we have cost a lot more to make and they are limited to one length of coupon
With a little modification and shop built dies, a Harbor Freight $100 pipe bender could do what that machine in Bill M's link does. I guess it depends on weather You find it easier to pay for a ready to go machine or cobble one together Yourself.