Hi Amy,
quite a predicament! It’s GREAT that several sellers have generously offered their panties as a prize. I agree with your point about ‘consolation’ prizes. Like Jazzy, I’d go for a random draw, although, I’d only draw for the winner not for other prizes that way every lovely seller who has offered their panties has a chance of being drawn and no one feels ‘slighted’ at being a ‘consolation prize’.
Though anyone that considers ANY of the lovely sellers panties a consolation prize needs a swift kick in the rear lol