Forum Moderators: phranque
Also consider Ebay - though use their feedback system, pay attention to customer satisfaction, etc - I've heard you can get some good deals.
If Ubid.com is still around - it was a huge computer auction site that's been around for at least 4 years (if it's still there...).
I think that about does it for the 'big ones'...then of course, in the ads themselves, it should be fairly easy to find smaller suppliers.
Direct from Manufacturer, there are Compaq, Dell, Emachines, Gateway...(just off the top of my head).
Also, check www.fatwallet.com and www.techbargains.com. Good resources for sniffing out hot deals, especially their forums. Often PC companies, Dell in particular, will have some screamin' deals on hardware, but you have to act fast.
Last word of advice; just go with newegg. Even if you find a lower price, saving a buck or two isn't worth the risk of a LOT of hassle.
Who needs new stuff, anyway? I just negotiated a sweet deal to colocate an old Sparcstation IPX to run my personal website off of. :) 80MHz, 64MB ram, but more than enough...