Who called from 6573787936

This person is trying to buy an item from me on Craigslist and wants to send me a check for the purchase,,then want to pick the item up.

Most likely scam.  The check is phony; he'll want you to send some real money by untraceable means to someone else.  After you wire the money you'll never hear from him/her again.  If you get such a check, take it to the local post office and have the postal inspectors look at it.  Could be and most likely is, mail fraud.