Home depot had the 800 milliamp for 7.53 (regularly 29.99) and the 1.5 version for 13.03 (regularly $49.99) on clearance by the lumber area in my store. The boxes were quite dusty. I have no idea if this is a good charger, but for $7.53 it will probably work for my lawn tractor battery.
Took pictures of the ones in my store ( I live in PA and I happened to be in the Altoona store this AM. They also had some ODB scanners on clearance there as well, but I only took pictures of these 2 items.
Home depot link: