Some consignment shops use the bait of a higher percentage return to motivate their suppliers into bringing in the items most in demand by their shoppers. Here, an example from the chain Second Time Around:
Is this something that your shop could utilize? Have you tried it? What were the pluses and negatives? (Yup, “compare and contrast”, just like in school.) Tell us in the comments, if you’d like to loan your expertise to your resale peers.
Auntie Kate The Resale Expert 
Here at Clothes Circuit in Dallas, we have evolved a percentage payout that is somewhat proportional. It just seems fairer than a single set percentage. Plus this percentage differential is how newcomers to the resale marketplace are attracting business.
In our case we pay 60% to consignors whose items sell for $250 or more.
In the case of extraordinarily expensive pieces, we will occasionally work off what the consignor sees as the return they must have in order to part with the item. .
Thanks Irene for your contribution! (Folks, check out the Clothes Circuit web site and their Facebook page from the HowToConsign Resale Directory.) WAY back when, I offered a higher percentage to items…. if they sold for $30 or more! How times change, huh. Working with the dollar return the consignor would like to see, we also did, usually for $1000+ items only.