Saw this at my local Costco (Mettawa, IL).
Battery Tender® 4.5 Amp Battery Charger & Maintainer 50% off at $29.97
As with most Costco clearance sales, in-store only, YMMV.
Online listing for reference only:
https://www.costco.com/battery-te…87415.html
Great battery maintainer, use this every winter.