Sure, I'll take cash, actually prefer it. I always do in person deals at my workplace. If worried about counterfeit money, take photos of transaction, including buyer, numbers on bills. Get more than one item of proof of identity, and take photos of those.
Lots of talk about ripoffs here, wonder how many have actually been ripped off. Vast majority of these scammers copy cats, common sense, not being greedy and/or desperate for money will suffice to keep one from getting ripped off.