lol bigmouth,
there really is no good reason to not upgrade. all my opinion of course
they sell on ebay, but usually when started with a $1 starting bid and no reserve. I saw an upgraded C+ HRG sell for more than $3K within the last 6 months. they don't sell when they are buy it now of $2500 or more.
do it if you have $600 burning a hole in your pocket
scott