How much does it usually cost to get a website built? From a simple website like craigslist to likes of ebay?

Freelance Web Site Designers charge by the hour. Therefore, the more complicated the Web Site is, the more it costs. However, large enterprises like Craigslist or the other sites you asked about, usually have someone in house that does their designs. That is to say, that usually their designer works on their staff and is paid by a 40 hour weekly paycheck.

There are a lot of people out there that can build your site, and that means many different costs. It all depends on who simple on complicated you want things. Big websites have someone on payroll monotoring their site daily. But freelance webdesigners can go from $50 - $600. You can always do one yourself with a free website builder online (ie. Freewebs.com, etc), but they will litter your page with ads. If you're trying to start a business, it looks really amature and unprofessional to have ads and banners all over the page. And no one will take your page seriously. They are also VERY limited in web site features. You gotta spend money to make money. Here are some that I've built for other people: www.jaggedlinebags.com www.theparanorms.com www.academypaints.com And they were all different in price. But if you're not worried about looking professional, then freewebs.com will suffice for free

Depends on what you're doing. If it doesn't need to incorporate a database or anything it's pretty simple. To get eBay running? They probably spend at least a million yearly to keep it looking good and running well. It really matters how complicated you want it, it could range anywhere from $75 to $500 for just a simple site.