Road made great gear.
People that have them tend to keep them as they have little brand recognition and pretty much fetch pennies.
They were created by Bud Ross of Kustom, but, (IMO) Surpass the T'N'R Kustoms by leaps and bounds.
I would make a firm comparison to vintage Acoustic.
I have had a Road 440 & Road 412 at 2 different points.
That amp and cab were some of the best that I've laid my hands on & I have had lots of gear ranging from Ampeg, Sunn, Fender, Acoustic, Kustom, Road, GK, Hiwatt, and many many more.
I firmly believe ROAD should fetch more or be at least equal to Sunn.
I had the 440 serviced one time and the Tech was amazed at the clean job on the inside of the amp. Mine was a mid 70's model and looked as if it just came off the line.
I had toured with it for years through an Ampeg 810E and put it through it's fair share of abuse and it just kept kicking.
I'm still kicking myself over selling that beast...