Not much.....If anything, the upgraded bike's frame will pull down the value of the upgrade components that's mounted on it.
Best way to get your money aback and maybe a little more is to build the bike back to stock configuration and sell it and the upgrade parts separately. And, unless you have very sought after/rare upgrade parts, making money on them will be a big challenge if you factor in your time, shipping costs and other problems that may come up during the sale process. Speculation with bike stuff is very hard to make money on unless you really concentrate on the "unobtainium" market where prices for components can just double overnight for no real good reason and then you have to catch the upward surge by selling at the right time.
JMOs

Chombi