Save-A-Lot actually has several variations of their store brand BBQ sauces, which I've been meaning to try. They have a basic one that looks like it's a knockoff of plain old Kraft BBQ sauce and is only 99 cents a bottle, then they have some specialty ones that are about $1.75 a bottle.
My go to sauce is usually the Stubbs BBQ sauce. I like that it doesn't have corn syrup. It has some texture to it as well, like a home made sauce, and it's made with real sugar. Plus it's got a nice peppery heat to it.