i always pull up the completed listings for whatever bag i'm selling to see how much they've gone for. then i'll either set the bin price at one of the higher amounts or the starting price a hundred or so less than the average amount of the selling price.
ebay sales have been pretty slow lately though. i've seen multipockets sell for $200-$250. if you want more money for it, you might want to consider waiting to list it sometime in the fall.
??? Maybe I will keep it and give it away for christmas...