As far as i know the Ford GT was only a limited run.... the last 10 of which were snapped up by Roush who gave it a tweaking and produced their Ford GT 600RE.
Hard to say whether these will appreciate.
Pro's:
Limited Run
Preferred Buyer Scheme
Iconic Shape (or close to it)
Con's:
Not the original GT40, very much a retro copy.
It's a Ford.... not exactly a badge that inspires collectors.
Jeremy Clarkson (from TOP GEAR) had one
Only Time will tell.