When you don't want to pay taxes, but need to turn coins to fiat, it's best to find someone who will pay you in cash. Just be safe and don't get robbed.
I had the reverse of this. I wanted to buy Bitcoin for cash, but couldn't find anyone to do it. Actually that isn't completely true, there are a few local dealers with massive spreads, but I decided they were far to expensive.
btw. by cash, I mean folding notes or a bank transfer during a face-to-face meeting.