I know it's hard when a potential client doesn't sign because of your rates, but as I've mentioned on my blog
here and
here, a client who is that concerned about price are much more likely to jump ship for various reasons, like the first time they have a rough money spot.
I'm actually doing a webinar for virtual professionals on finding and claiming your value in August that includes tips on dealing with potential clients that will help them recognize the value rather than balk at the rates.