Two (2) iRobot Roomba vacuum units, along with 2 pairs of virtual walls. Both units work, but have been sitting unused in my garage for years, so the batteries no longer hold a charge. Both will need new batteries, which are widely still available on sites such as Amazon for about $30-$35. However, I just discovered one of the power charge adapters now seems to be defective (also available on Amazon for about $30), but the other one works on both units, so I am bundling them both together for $50. These robot vacuums sell for over $300+ each, so for about $100 more, you can remediate both.
Pickup in Richmond, near No.1 Road and Blundell Road. Both vacuums for $50, firm.