Yes, I think 2 BTC per unit with PSU and VAT paid is fair.
I'm new here, I'd rather deal in person, by phone or whatever - not some escrow I don't know... I'm aware this will not entice some people, but that's the deal.
I think you are going to have to do your research, because no one is going to trust a Newbie with even a fraction of 2BTC, and you want to sell 20 of those. Its just not going to happen.
If you dont want to use Escrow, you will have to ship first and find buyers that have enough rep to seem safe. (That will pay you after they verified the unit(s))
But thats a bit silly, so you're going to have to learn to use Escrow, this is the most trusted one on this forum with Millions of USD of successful escrows;
https://bitcointalk.org/index.php?topic=303281.0