$300 shipped to the lower 48. The 800 model combines the following features:

fuel flow/used (sensor not included)
OAT (sensor not included)
Oil Pressure (sensor not included)
Manifold Pressure (sensor not included)
RPM (sensor for the Bendix mag is included)
CHT/EGT (probes not included)
Download port for engine data (I will include the serial port connector for your laptop to download data).

The RPM sensor alone sells for $269 online new.

Connectors and wiring for the data port, RPM sensor and fuel flow/EGT switch included.

Note, any missing digits displayed are caused by the cell phone camera. The display works perfectly.