BigValueInc (99.3% approval) is selling a limited quantity of Canon EOS-1D X bodies for $4799. This is the least expensive I have seen it in a while. The camera costs $5999 after an $800 mail-in rebate from authorized sellers.
Canon EOS-1D X Body $4799 (Reg $5999 after $800 MIR)
*as always with ebay, these items are likely grey market and may not be covered by a Canon USA warranty)