Craigslist's phone verification system is required if you are going to post an ad under SERVICES section. And to bypass this you can post it in other sections - maybe 'For Sale', under the specific product category.
I am not so keen on using Craigslist as a selling platform. There is no forced accountability on both parties. Buyers can back out of the transaction and since the site does not provide identifying information, it will be difficult not wasting your time on bogus buyers.
I may be wrong, though. :) Kindly share with us how you got on.