Note sure if this works but can't you go there with a friend or anyone you know and you return it and have that other person rebuy it? It is technically not you rebuying so they shouldn't have a problem with that should they?
i've been looking all over for the big stormtrooper clock but with no luck. Anyone seen these still around thier walmart? I did however find few mid-scale mil falcons (7778) for $19.
Stopped by target to get some Halloween stuff on sale and saw bunch of Lego minifigs bunched with the Halloween stuff on sale for 50% off. Ymmv of course.