Yes, when buying and selling cash or paypal is a must. We sold a ton of stuff this way when my dad passed away. We didn't have any scammers.
I just wasn't expecting this when I am selling a service. With a business I should be able to take a check from someone. However, I should possibly re-think that concept, craigs list or not. Maybe I should accept credit cards and cash. Period. Again, our world!!!!
Several people I know who run small businesses advertise "cash or debit only" (debit card is cheaper than credit card for the vendor); however, for long-term relationships, they do take cheque... it still has a slight risk, but not nearly as much as from a "new" customer. Just don't tell "new" ones that you take cheques - ever - until they meet your comfort level.