You'll want to edit your post (parkourX instead of parkour) so your terms are consistent for appraisals; a lot of us won't be bothered to sort it out, just more work
At any rate, I think parkourX is one of those maybe-maybenot brandables; if an end user happens along who loves it you might make xx to xxx for it, but IMO it's the kind of name that would sit there for years with no offers. But who knows? If you're into parkour, as you seem to be, then it doesn't make much difference if it has little value as an undeveloped domain name, since you bought it to develop for your own interest.
I had never heard the term before, but of course had heard of free running. Had to read a little to understand the difference between parkour and free running, but now I've got it.