While it may well be the case I've seen more than enough of these sites that offer the goods and then amazingly can't get you a delivery date! It happened to a friend of mine with an e46 M3 when they first came out. Basically the delivery date was so far past launch (even though he was putting in his order early enough) he could of picked one up from the dealer without waiting.
Even more amazing was that after they'd let him down he received a torrent of calls trying to sell him a list priced car. Funny that eh?
Then again, could be legit I guess!
330d M-Sport | Sapphire Black | Black Dakota | Nav Pro | iDrive | Bluetooth | PDC | Xenons | Hot Seats | Tracker | Blacklines