@Freespirit1111I dont exchange phone numbers because I dont want the buyer to potentially harass me by calling me at all times of night if I end up not wanting to sell to them. They can also easily track down my address very easily with just my phone number. There's a lot of things that could go wrong with giving your number out on these selling apps to perfect strangers.
I use a smartphone with Tello (a Sprint MNVO).
I paid $50 for it 5 years ago.
I pay $10 for texts and/or minutes that can last the whole year. It is 1 cent per text and 3 cents per minute.
I only use this phone's number for selling.