I have found a couple of places where you can get something similar to this for about half the price. What I've found is exactly the same except it is 10.1 inch. If you check this Amazon page, there are a bunch of NEW Asus Eee PC 1201N Seashell Netbooks starting at around $260. The screen is smaller, but it may be worth the money to get this one instead of the 12.1 inch. You can get one of these smaller models from Buy.com for around $300.

You can also try Overstock.com. I checked and they don't have EXACTLY what you're looking for, but they come pretty close. And you'll get a good price for a refurbished piece.

This is a refurbished Asus Eee PC 1101HA 11.6-inch Netbook for $275, not bad:
http://cdn2.overstock.com/images/products/P12513226.jpg

This is all the information I could really find right now. This seems like a tough thing to get used. I would also suggest Craigslist in your area. It might not be available right away, but keep your eyes peeled, because most likely, the person will write a description and perhaps include a picture in their ad so that you can get an idea of what you will be buying.

Hope this helps!

Did some serious searching and found that the average prices at other sources were actually lower than the average of the Ebay prices.Amazon.com had $484 as the lowest price, and Newegg wanted $489. Bounti.com was offering the netbook for $468. The best price I found was on Google products from ASUSTeK for $421. I doubt that prices are going to drop much at this point. This particular netbook seems to be selling fairly well and that will keep the prices up until the demand drops. Asus has gotten a fairley good reputation for quality and reliability in its laptops. In a rather serious reliability survey on the 3 year reliability rating by manufacturer Asus and Toshiba were at the top of the heap while HP was at the bottom with more that 25% failing within the 3 year timeframe. So I would not expect the 1210n to drop much in price for some time to come.