Shimano GRX Di2 11 speed 1x group. Included items
GRX RX-810 172.5 crankset with 40 tooth chainring
Di2 XT rear derailleur can handle up to a 46 tooth cog
GRX RX-815 hydraulic disk brakes and calipers
Chain
Battery, wires and junction boxes
Bluetooth/Ant+ adapter
E-thirteen cassettes 9-39 and 9-42 XDR cassette body compatible
All for $700

Quarq Dfour power meter 172.5 with 36-52 Dura Ace 11 speed chainrings(will work with 12 speed) and English threaded bottom bracket
$350