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offsky - 4:57 pm on Apr 10, 2006 (gmt 0)
These dont account for some things such as future potential, competition, uniqueness, etc. There are many domain appraisal companies out there that may or may not be able to give a good estimate. <snip> The real price is whatever the buyer is willing to pay :) [edited by: stuntdubl at 8:22 pm (utc) on April 13, 2006]
To get back to the original question, the 10x rule is pretty good. Sometimes a cost/user valuation is used. So you can take your yearly unique visitors and multiply it by whatever you think 1 person is worth to your site (a few cents probably).
[edit reason] no urls please per TOS [webmasterworld.com] [/edit]