C.O.
MK:
You have several choices:
1. Consignment shop - they will sell it for you and give you money - they have already done the research on the bags and will know the right price to charge.
2. ebay - takes time to get the right pictures and listing it correctly. Dust bags, boxes, tags, etc.
go to ebay and so an "advanced search" for closed/ended listings on the Coach purses you have in your collection. Depending upon the purse and number, you might get more for it than you know.
Good luck!