i dunno, might consider buying online CAREFULLY unless you live in a bigggg city.
jewelers fuck you and they fuck you good.
it all depends on what it is you're getting. a simple gold or silver piece or something, i wouldnt worry about it much. even ebays got some bands for very cheap.
Depending on what you're looking for, www.hautelook.com has some good deals. Really nice stuff. It's all private, limited time sales, usually 24 hours or so but you'll get really nice, brand name stuff for 60-70% off. I bought a watch from them and it's all legit. You just gotta keep your eye open for the stuff you want and jump on it.
I've heard good things about Amazon.com, but I've never ordered any jewelry from them so I cannot vouch for them.
I'd strongly recommend www.hautelook.com, it's your best bet for quality and price, but since you're in a hurry you should just go the eBay/amazon route. Or check out a local jeweler.