how do people go about selling bags...

There are trading assistants on eBay. some specialize in high-end designer bags, clothing, etc. It wasn't LV, but recently I used a trading ass't. who lives near me to sell a couple bags on eBay, and she got more than I ever imagined for them. Of course, for my convenience and her work, I paid the listing fees and a commission to her, but I still made a decent amount.
 
Ebay probably is the best route unless you're selling Goyard ... there're too many counterfeit Goyards on there that the real ones are having problems sellilng for a decent price.:crybaby:

With regards to trading assistants, make sure you and the TA agree on the % for commission. Some of them charge 50% of the final transaction price and in cases like that you're better of selling it yourself.