Anyone take adv of Brake Buddy old for new discount?

Ours made the trip to BB 7 times in 6 years. 3 years ago when it failed again, 2 months after in house service, I asked if there were any trade in deals for new or refurbed units, BB told me told NO. We were at a FMCA show a week or so later Blue-Ox offered $400 off for any "brake in a box" in trade for a new Patriot Braking System. Needless to say I have a Patriot now. I do not miss BB's leaky air compressor based system at all.