Freelance as a Service
letsworkshop.com
letsworkshop.com
In my experience, most clients that actually pay a fair amount of money are those that understand what their getting into. These clients understand that they'll be forking out $20k - $40k for a project. So, in these cases, posting prices is irrelevant. They just want the best person for the job. Your sales challenge will be elsewhere.
Now, if you're targeting the mom and pops in town and their average budget is $2k, then posting your price MIGHT help. BUT, this is simply a race to the bottom. If your rate for a project is $2k, but a competitor will do it for $1.5k, who will the budget minded client choose? Based off of the price alone, you've just scared away the client. You probably won't even get the opportunity of an in-person meeting.
Bottom line, choose your clients carefully. If they pick you because you're the cheapest, you might have bigger problems ahead of you...
Businesses are in business to make money. If you can provide value (I'm not saying you can't) and they see an ROI on their money, they'll pay. They want a solution to their problem AND they want to work with someone they like and trust.
For your typical client engagement, yes, you won't want to post prices. Unless your business is well-defined enough to be able to target specific types of clients, each with its own landing page and predictable project scope.
When I was a freelancer the goal was always to set up small recurring tasks with a number of clients to smooth the peaks and troughs of work and bring in a regular income. These examples are a great way of showing how this idea can be marketed and scaled without having to rely so heavily on word of mouth or existing relationships - though I'm sure they do still play a part.
The change in approach from 'See what I've done for others', to 'Here's specifically what I can achieve for you' is key.
Stuff like defining who is the user, what are their needs, performing basic user research, establishing an information hierarchy and testing their designs against potential candidates.
It's been my experience that too many designers these days are more into the "fun stuff" of picking a color palette, creating awesome background textures, geeking out on CSS3 animations and other things that help enhance your dribbble profile at the detriment to applying themselves to the craft of design.
A calendar does this.