What are typical website “sales price as a multiple of monthly earnings”?
I don’t know because I have never sold one. However …
Sitepoint article shows charts here that in 2008, content sites typically sold for 24 times multiple of monthly earnings. For blogs, it is about 18 times. Sales prices at 12x monthly earnings are very common too.
Note that the charts shows “sales price as a multiple of monthly earnings”. That means revenue minus cost. But each site is different, there is no really good way to place any accurate numbers on it.