Is a customized Bicycle Worth more than a store bought Bicycle?

Depends on what you mean by customized and what you mean by store-bought. A bike bought from a "real" bike store is likely to be worth more than bike from Target, wal-mart or similar. And customized is always tricky. It's always done with a certain goal in mind. And if the presumed buyer isn't interested in that he's unlikely to be willing to pay extra for it. Also, an x-mart bike with a tricked-out paint job would still be an x-mart bike, only slightly better looking.