The following is a rough guide:

When considering how much to spend on a website design, think about how much your business means to you and how important your website will be. Will it be simply a glorified calling card or will it be the main sales tool of your business?

If an offer seems too good to be true, it usually is. Basing your decision on price alone is not always the smartest option. I have lost count of the number of clients who are seeking work from professional designers because their first, low cost design turned into a disaster; forcing the client to effectively pay twice. Like my good friend once said, "I'm not rich enough to buy cheap things. "