djknight said:
You must know much about Walmart to ask me why I'd be getting rid of something from them... or did you forget their reputation for "quality"?
Well, I do know that it is a relatively inexpensive bike ... but, the components should be able to withstand quite a bit of abuse ...
Presuming the front derailleur stopped working BECAUSE it has rusted, then you simply need to apply some (a few drops) HOUSEHOLD OIL (e.g., 3-in-1) to the pivots once a day for 3-to-7 days ...
On the 3rd & subsequent days, you should try to manipulate the derailleur's cage by pulling directly on it (vs. with the shifter) ... it will eventually loosen AND THEN you should apply a couple of more drops, manipulate & wipe ... repeat until the oil runs clear.
After that, apply a couple of drops of oil at least once-a-year.
An expensive front derailleur can seize, too, if you neglect basic maintenance.
Shimano's (and, presumably SRAM's) low end components are just as functional as their more expensive "stuff" ... they are usually just made with more steel than alloy (so, they weigh a lot more) & not finished as nicely ...
So, don't blame Walmart, Shimano-or-SRAM (whoever made the components) for the failure if rust is the problem ... maintenance is the responsibility of the end-user.
BTW, oil the chain, too!