is aspen the only single-ticket event? and did it only become that way because of demand?

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food and wine
$1250 aspen http://www.stayaspensnowmass.com/eve...-classic-aspen (~5000 tix?)
$250 austin http://www.austinfoodandwinefestival.com/#!!tickets

wine
$4250 naples http://www.napleswinefestival.com/20...e-festival.php (~600 tix?)