If you need a throw around everyday bag that you won't baby, then I would keep it. Unless you feel comfortable doing that with a Chanel. I am not sure certain styles will sell for that much. You can buy a marmont camera bag new for those prices as well. I would check first to see what they have been sold for vs listing price. Agreed that it is everywhere and overdone/fakes market has ruined it for me as usual. On the flip side/in defense of your bag, I personally don't want to get rid of my Marmont mini, because fashion is cyclical, I want to keep something iconic from the Alessandro Michele days (in the event he is no longer director and I have something from Tom Ford and Frida days) and I don't feel bad getting it ruined/busted if I use it more often.
