One time no questions phone trade: dealer independant?

[agent0014]

So here's a potentially dumb question... do I get to do my one-time no-questions-asked trade in regardless of who I buy my phone from? It looks like there may be a way to get the amazon price for the moment even for an existing user... there's also best buy and wirefly. Would buying a phone through any of those sources still give me sprint's one time trade in within 30 days if I decide I don't like my Moment (or possibly Hero, but probably not)? I'm still nervous about Samsung's intentions for 2.0 and the lack of a community working on rooting, so I'd like to know that I have 30 days to switch if I don't see anything that comforts my nerves. Any help would be appreciated!

EDIT:

Ack... I can't believe I spelled "independent" wrong above... and of course there's no way to edit the thread title! Oh well, Don't hold it against me lol.