I hate selling and buying anymore..

About five years ago I was selling my daughter's 05 Neon, car had 70k on it and was super clean. I had a sign in the window for $3500 and I got quite a few calls, in the sign it said No Texts so I got more of them than calls. One in particular asked me for the bottom dollar on the car so I responded but didn't answer the question. So the guy keeps texting asking all types of questions witch I didn't answer then finally wanting that bottom dollar again. So I told him 4k and he responded instantly saying the sign says 3500, I told him the car was $3500 and putting up with his BS was another 500. Never heard from him again.
So now I just put that on the sign, car is $500 more if you text me.
I did get 3.5k in cash for the Neon.