Who called from 7243541118

Responded to my add for a van for sale. Offering an extra $700 over asking price. I see they do this often it will be a scam.

I've got text from this and another number which will report separately (the same are code) from anknown source.

I have been receiving calls for weeks from this number.  I have called them back about five times and am never able to talk to anyone.  Each message is that they are unavailable.