ebay (via Electronics Valley) has the Canon 5D Mark IV for $3344 (reg. $3499). This is a gray market deal and Electronics Valley has a positive feedback rating of 99.7%. Check it out here on ebay.
That’s not quite the substantial drops in prices we see in other models, but if you’re looking for a bigger drop, consider waiting a couple months or so as gray market prices drop further.
I’m all for saving money on gear as much as possible… but if you’re dropping over $3K for a camera body, do yourself a favor and buy from a reputable merchant with return/replacement policies and legitimate warranty options.