If you put your quilts in the Melbourne show, do they allow sales of the quilts on show? That would be one way to get eyeballs that would be interested.
The problem with distant pricing ideas is there are a million different skill levels, color choices, and sizes all we could go is guesstimate
Somewhere else on the board today, a rule of thumb was cost of fabric, doubled.
The problem I see on etsy is the photographing. The competition is so intense if your photos aren't fairly professional it lowers the chance of a sale. Patience is required there too, to wait for a sale.
I know two women who make samples for quilt shops, then the fabric line is gone the quilts are sold.
To save space and dollars for me, I make double sided quilts.