Well, it depends. You can definitely go below invoice with Navy Federal car buying service, USAA or even Costco auto - we're talking anywhere between $700 to $1200 below invoice depending on the model (not Rebel though). But that may not be the best deal. You may end up with a better deal if you live close to a volume dealer who can give you 10%-12% (or maybe even more!?) off MSRP plus a 1% corporate discount in which case below invoice doesn't matter since you're getting a better deal this way. But if you live far from a volume dealer, adding an additional $1700-$2000 to ship to your place will probably break even with getting a below invoice deal (excluding rebates).