One memorable Xmas my dad bought 3 R-U 10 speeds at the local Gemco. He put them together himself. Getting them to work properly was outside his realm of expertise. After my sisters abandonded them I made one sorta working bike out of the three. Rode it a lot. It required constant fiddling to keep it working. The sharp edge on the cottered crank kept my ankle bone shaved down nicely. I appreciated the Royce-Union. I wouldn't pay much more than $20.00 for one.
Like someone said above, one step above a Huffy of the same vintage.
And beware of any post that starts out "whats it worth?"