I've recently taken on turning our local bike swap into a fundraiser here in Helena, MT.  Previously it's been a low turnout, low publicity affair.  I'm new to really any kind of organizing, but I like my ideas and hope to glean some info from some experienced voices here.  Here goes:

Commission/consignment:  what percentage of a sale have folks found to be a number that doesn't turn people away?  Also, a handling fee for those that don't sell their items, thinking about a per person charge, vs a per item charge i. e. bike, clothing, parts, etc.  Mostly interested in bringing people in since this first year is intended more for exposure.

Pickup time for unsold items:  Has anyone experienced difficulties with people not meeting a stated pickup time for items, then demanding their items back.  Is this an appropriate situation for a signed waiver or legal document of some kind since some of these items have some value?

Thanks much,

dave