Not for normal people. But I have sort of a fascination with vintage audio stuff... vintage Grado in particular.
So I have both the vintage RS-1 (with buttons) and the current RS-1i (well, the RS-1e is more current, but unlike other e's, there are many folks that think it is a step backward from the RS-1i).
The RA-1 amp (the wood one in the picture) is said to be similar in circuit to the C-Moy, sold in the Altoid mint tin for 1/5 the price by JDS Labs. The Joseph Grado amp, which is the HPA-1, dates from the 1990s, and was designed at the instigation of Joseph Grado for his HP-1000 headphones by Sidney Stockton Smith of Marantz, and assembled by hand by Mr. Grado and a former Marantz quality engineer whose name escapes me right now. That said, John Grado says that the RA-1 has the same circuit as the HPA-1, but folks here who have compared them say the HPA-1 has less grain in its sound. There were only 125 HPA-1 made, and they are hard to find.
I have both, and I have not really sat and compared them... they are both Superb!
And for the (metal) Joseph Grado headphones, of course you need the (metal) Joseph Grado amp!