Yes but this is a problem. If I sell it for 1-2 btc, someone could sell it for 0,5-1btc without me.

That's why selling retail is not a good idea.

Here you can make you offer as a sindicate. Let's say that 4 people bid for 16btc. Everyone will just buy for 4BTC and it will be exclusive in some way.

For sure I don't want to sharing this script for less then 10 btc.. I would rather not to sell it anyway.