when ever we get to that point, yes you can use Paypal.
As for your order, putting it in the sheet is adequate.
For now we are probing interest, the drill is like:
Probe interest, people state their orders in the sheet
getting quotes
people confirm their order by paying using Paypal
the order is placed
When I and @mwl168 get the boards we ship to the participants and add shipping cost (mwl168 ships US/Canada, I do outside gods own country to keep shipping low)
after some weeks boards are in various hands
Fair point and hereby changed. The golden Reference Low Voltage will be the split board version (the number in that column will comprise a set (left + right).