I wouldn't worry about saving the old controls for later resale.
The guitar is not really collectable, and most players would appreciate the change to CTS pots and a CRL switch (although Fender doesn't use CRL anymore; I don't like their stock switches).
If you decide to try it yourself, you can buy the pots and switch from <a href = "http://www.tubesandmore.com"> Antique Electronic Supply </a> cheaper than about anywhere (probably $25 with shipping). You can get a solder iron and the caps at Radio Shack for another $15. You'll save $20 and be ready next time....