Smiley, you're going to have a very hard time finding a new 17" LCD monitor for that price. I've had a quick look - the $345 price point is still littered with "house brand" and no-name monitors - some of which may actually be fine, because some of them are using the same components as the big names, but I certainly wouldn't buy one without seeing it!!
If you can manage $400, you might have a little more choice. And there is always eBay! There are LOTS of 17" LCD's available on eBay - you could probably get a good one for close to what you're willing to pay. BUT - you must do the legwork first - go to Best Buy and CompUSA and look at monitors and compare. What you like may be quite different than what someone else likes (you can see that in user reveiws - what some call fuzzy, others call sharp!). Then, when you have a good idea of what you like, AND what the retail prices are for the models you like, then you can start looking on eBay.