It's a scam. They will send you a fake business check from an bona fide, established company. The check will clear, about a month or two when they find out the funds are missing, the police and bank will come after you. You will pay it back.
I received a call from this number in regard to an ad I placed, too. TOTAL SCAM Beware all! I have a friend who is a police officer check this out. Verified it is a SCAM. My friend is in the process of investigating this person/company.