What scam is this?

I have listed one of my cars on craigslist about a month ago. I priced it extremely high because i dont really want to sell it but it gets the wife off my back as she thinks i have too many cars. Anyway I get about 3 texts a week that will say, "is your car still for sale? if so please call me."
If someone can text why do they not call? Its always a different number so Im guessing its some type of scam. I always reply back to the text with this, "if you can text you should surely be able to dial the number and call yourself"
Never another response.
So now I ask, is this some kind of attempt towards a scam?
Thanks Rod

Yes sir! What they’re trying to do is get your number so the can clone it to call other people! You know...the calls you get from someone who you migh know in the area...only to answer and it be someone trying to sell you an extended warranty on a car or to let you know that you can get out of your financial student loan debt! That’s why I NEVER put my phone number on CL add...emails only!