Not really apples to apples but I will share.
I picked up my 25' TT earlier this year. I did not have a WDH and planned on looking at Craigslist (seen several for way less than dealer).
I already had a 2-5/16 ball from my flatbed car carrier and I used that to get it home. Made it home OK but I definitely knew it was back there. Two days later I found an add on CL for a Pro Series WDH with 700# bars, and sway control for $150.
Met the guy and he had used it twice and it was set up for a 2500 truck and a 28' TT.
I offered $120 and took it home. The ball was about the same height as yours and yes it was all over the place. 45mph tops for me. Got to a large church parking lot with the tools and set it up right and now after about 1200 miles seems to be good to go.
Edit to add page 2 owenage!