They are super cute. However, I know I would never wear a heal like that. Other options on shoes might be better. Where are you getting your shoes from. Is is possible to find a cheaper supply? $95 is a bit more than I would pay for a pair of shoes, custom or not.
I would also change the pic of the glitter. It looks to me like a picture from the catalog you buy glitter from. Personalize it more, even if it's just the colors on paper. Change the names up a bit too. I did that when I was making soap. I wanted to set myself apart from the people who bought the same scents I did. I assume the are all super fine glitters. If not, separate them into categories based on the type of glitter, then name them. For example, the Emerald fine jewel could be under the super fine category with the name emerald city, or forest glen, or luck of the Irish etc. Or look at how OPI names their polish. The apple could become hot kiss, passion, or cherry soda. Not suggesting using OPIs names, just be inspired. Also, possibly custom blends, or designs? Gold, to orange to red for a flame shoe?
I think showing more shoes will help you. Having more examples. That will be an investment up front, but I think it would help.
I don't have an etsy shop, so I don't know 100% how they work, but is it possible to list shoes at the down payment price, then create an item for people to purchase their finished shoe? I know I wouldn't buy a shoe if I had to message you and make a payment without even buying an item. I would guess I have no proof if you were to flake. At least if I bought an item I would have something to show for it. Even if that item was a down payment. Just make sure it's clear that the item they are buying is a down payment and the rest would come with a second item listing.
Just my thoughts, take them as you will.
ETA: I would stay away from Craigslist. People on Craigslist are looking for deals, not hand made items. I would not think it your target market.
ETA again: I see that you said you would create a listing for someone once the convo you. Again, not knowing how etsy works, are you able to send messages with an order? That way you can have listings up and people send a message with the order on the color they want?