So why do they need 2 servers?
Also, I'm pretty sure VPSes and shared hosting were available in 2000.
Rackspace offered dedicated servers for $150/month and up. Smaller providers would rent you a server in their datacenter for around $60/month. I used a company called sagonet in the early 2000s that is still in business and still offering a similar service for about $30/month: http://www.synergyisp.com/dedicated-servers/
Most larger companies at the time contracted with a colocation provider and purchased servers for between $1000 and $4000 each, and paid in the neighborhood of $1000/month for a rack, or $500/month for a half rack, including power and network.
This was monumentally cheaper than the AWS based stack we have these days, though - no company with any complexity to their website has a $40/month AWS bill. A company with a similar SAAS offering to what I ran in 2001 for $40K up front and $500/month is probably looking at a $5000/month AWS bill at today's rates.
I imagine a self-driving car packs a ton of servers, I'm not sure it can be cheaper than your average mid-range car...
In year 2000, in order to run a medium web site as a company you need 2 Servers one for each Database, WebServer. People bought each server box for $5000 and server capacity used is only at 15%
Come to 2012, Amazon AWS charged for the same Servers only $40/month . Amazon know It costs lots for website owners, why they offer all the server capacity for $40 ???