You won't get any extra selling that French thing with the Superbe parts, and it won't be a show-stopper for the buyer if it isn't there. Essentially, if you leave the Superbe parts on the bike you're selling, you giving them away free-for-nothing.
Leave the gun, take the cannoli's.
__________________
"Love is not the dying moan of a distant violin, it’s the triumphant twang of a bedspring."
S. J. Perelman