Where to Buy a Cheap Server?

I would like to buy two or three very cheap servers in order to create a private cloud system based on Linux. As it is for a cloud it doesn't really need to be the best quality but it should have a good CPU and plenty of memory. My other criteria is that it has to be a really cheap server. For that, I was surfing today through a few computer manufacturers, which also build servers like IBM, HP, DELL and Transtec to name a few. To my disappointment, I noticed that in most of the cases the no name servers are more expensive than the entry server from a well known computer company. So what's the point going for a no-name server, I thought. I'd rather go for a well-known manufacturer, where there is some serious company behind which would exchange the hardware in case it breaks down. Among the server manufacturers I have cited, DELL would be the cheapest with pretty much the same hardware inside than HP or IBM.
So to conclude, I have to say that DELL would be the price/quality winner in my case. What do you guys out there think? Any other recommendation for a cheap but good server?