Farmer's Market customer interaction question

Hi everybody!

Today was my second farmer's market. Last weekend was my first and I did not have samples. Today I had samples of the bars that I make and I have my standard bars that are $4, and then I have a fancy bar which I had cut up some and made samples but ran out. Then this woman came up and mind you, I had samples of everything else out on the table, and she told me "you should have more samples". I told her I only had 3 bars left and didn't want to cut one up for samples. Meanwhile I'm cutting samples of other bars. Then the woman left and walking away said that she would have bought something if it wasn't for my attitude about the samples. I was probably shorter than I could have been, but I had so many samples out already, and it was only 11am when the market was going til 3pm (I did sell all the bars by description alone).

My question to you, fellow chocolatiers, is what would you have said to this person who is telling me what I "should" do, when I felt that I was out of samples to give and it would be losing me money. Should I have just cut up one of my $6 bars in hopes that she would buy one of the remaining 2? I felt like I did the right thing not cutting up more product that early in the day.

This was almost 12 hours ago and I can't stop thinking about it, thanks for your input!