My wife and I buy and sell on Craigslist regularly because we live on a farm and it's easier to find what we need by bartering on CL than driving to the big city to spend all day looking for the same thing.
CL is a cash business. No cash, no sale. No checks. There is no layaway or holding items for someone. It's first come, first serve. Items are sold as is. If buyer can't haul item away, they don't get it.
I've received the same kind of messages about the buyer sending a check and they are sending movers to pick up the item. It's usually a high ticket item where there's some money involved. I've always just ignored them because they are trying to scam you.
Just stop and think, why would some stranger send you $2000 extra to pay the mover? It doesn't sound right because it's not.
My advice for someone who needs the input of Facebook or FR to figure out if they are being scammed or not, is to stick with shopping at the retails stores and donating items like this adjustable bed, to Goodwill or a church.
Sorry to say, but the scammers out there are looking for folks just like you.
That's why I avoid CL altogether. I need to buy a couch (& get rid of the old one), but will instead go to a retail store. They can also arrange removal of the old couch, as well as bring in the new one.
(Also, I can pay with a credit card, thus add Frequent Flier miles!)
I was always afraid of CL for other reasons, maybe reading about murderers & predators.