Nickel and Dimers - How do you deal with them?

How do you deal with people who try to beat you up on your prices?

I'll make a reasonable counteroffer, if they don't accept it then I say good bye.

if they ask for 10-20% off asking price i give it to them , if they ask for 80-90% off i ask them to leave

low balleers are a pain but lets be honest many storage auction buyers ask crazy prices for their stuff as well. i saw someone selling a bunch of video games on facebook like 4k worth. it was used stuff and they were asking for 30% off retail as if that was a good deal. not only is it a ton of work piecing everything out but who knows if everything works plus ebay is gonna take 13% right off the top. needed to shift that 30% off retail to more like 70% off retail