I am selling a purse I have had for the last 7+ years. It is a Kate Spade Pia in Vachetta Shiny Black leather. I listed it last night and someone messaged me asking me to set up a BIN. Should I? What price should I set? I notice a lot of interest in the auction and don't know if I should just set a high BIN (say 150) and let the auction play out. It's tough to say what the item is worth because I don't know the market for KS or the rarity of this specific style. I don't have any previous sales of this item to go on. Help! Thanks!