[MDB8]

Sony A7R IV body with battery, charger, (never-used) strap, box, even a memory card, etc. $3000. Pretty firm on price.
If you don't know much about this body note that it has a 61 MP full-size sensor. Being mirrorless, it can take a tele-converter with no slowing of focus speed. 5.7 million dot EVF with adjustable frame rates.
The manual can be downloaded if you seek more info.