I stumbled on this at RVUpgrades. Aside from having some of the lower prices for towbars, they seemed to have paired with Blue Ox to offer a trade-in on select older models (theirs and other brands).
If interested in Blue OX, you can see their deal here (https://www.rvupgradestore.com/blue-ox-towbars-s/19.htm) .
This is just an FYI. I have no affiliation with the retailer, but have used them in the past successfully.
I went to Blue Ox factory and had my tow bar refurbished. I had a second one too and I traded that one in for a new one and got the 150 off a couple years ago.