a good base to strive for is materials x 3
but not always possible at craft shows-
location/venue matters....some areas, venues people just expect to pay a better price- some areas, venues the only people who sell anything are the ones who are selling the $1-$5 items-
so ask around people who have been to this bazaar in the past- or who have had booths at it-if possible- or do you know the area?
a bit of research will be benificial with your pricing.
but if the area/venue will (tolerate it) materials x 3 is a pretty fair amount to expect....you can always do the math- then decide---and adjust as what you feel more appropriate....would you pay that much for it? if you would not= no one else probably would either....if you think you can get more===well try it. if after a couple hours you havent sold anything you could always...have a sale-and knock 20% off or something.