While watching some Motobecanes on the eBay, I noticed this discrepancy between recently ended auctions. This specimen:

http://cgi.ebay.com/ws/eBayISAPI.dll...=STRK:MEWAX:IT

sold for $1,580.55, while this one:

http://cgi.ebay.com/ws/eBayISAPI.dll...=STRK:MEWAX:IT

went for $720. The first does seem to be in more original condition - wheels, cranks, and brakes are OEM. Those TA Professional cranks and the Ideale saddle are expensive on their own, but is that what it takes to double the price on a bike like this?