Check online prices on the Eufy 11S (my recommended Eufy Vac) here:

Check online prices for the Shark Ion R85 here:

John does a comparison and demonstration between the Eufy 11C (11+) and the Shark Ion R85 Robotic Vacuums.

Robotic Vacuum Comparison Eufy 11C (11+) and Shark Ion R85 Wireless Vacuums | Weekend Handyman