IMO oppinion NO way is it worth $500.
I gave mine away for a case of beer + Shipping, that show exactly what I think it was worth. And the case of beer was just for mu time to uninstall, disassemble and pack for shipping.
For $500 you can have a 2" receiver fabricated and installed then get your choice of bike racks or cargo trays the are much better suited for the job. My frame to frame support receiver was fabricated and installed for $300 at a custom hitch shop. My current cargo tray cost $150 and it has wheel racks to hold a legitament 4 bikes. There is no way I could get 4 bikes on the Jayco rack with out them banging together or the back wall of my TT. I also have a 4 bike frame hanging rack that I use occasionaly.
2007 Chevy Duramax LMM/Allison
2012 Jay Flight 29QBH
2012 Jay Flight 26BH (Sold)