Denon DA-50 in great condition

I'm reducing my analogue collection:
Here's a real beauty! A Denon DA-50 S-shaped tonearm with Dynamic Damping, and including the original Denon headshell. This arm is in amazing condition, with the only signs of use I can find being some light wear on the headshell where the cartridge screws have worn off a bit of paint, and a pair of light scratches on the arm tube where it is held by the arm support. Even the original 5-hole din to RCA cable looks great. The rubber gasket at the arm base is soft and pliable. This arm has served me well since I bought it new in 1981. It was on a Denon DP-1250 for a number of years, then as a second arm on a heavily-modded Rega P3, where it was my go-to arm for experiments with MM and MI cartridges, being relatively low-mass (sorry, I don't have the value! Compliance and matching weren't talked about much back 40 years ago!). Has easily adjustable VTA (a small screw art the base loosens, then the arm easily slides up or down). Easy to set anti-skating. Overall a lovely tonearm. 
Specs as I know them are:   Effective Length: 244mm   Overhang: 14mm   Pivot-to-Spindle Length: 230mm   Accommodates cartridges of 5g to 11g 
My favorite cartridge on this arm was a Signet TK-5Ea, which I still have. I am willing to make a deal to sell the arm, cartridge and extra NOS Signet stylus for $400. This gets one into a nice MM sound with a small investment. The Denon DL-301 is also a great match, and though one wouldn't think the arm mass is enough, many have reported that the DL-103 is a great match too. All I know is that my Zu DL-103r weighs too much for this arm...;(   
Will be safely packaged, and can be sent using the shipping service of your choice.  I will sell only to US and Canadian buyers. No overseas or south of the border sales. Sorry to my Asian, European, Russian and South and Central American friends, but there have been too many attempts at fraud coming from overseas for me to deal with, so I've given up trying. One (or several!) bad apples...