This is a piece I bought online from a "brocante" to resell. I paid, including shipping, about $14, sold for $39.99 so not a huge profit but I knew it would sell. It's a beautiful decor piece for a kitchen. Just as is, or with dried flowers in it. Or fresh flowers too as long as you insert a small glass jar in it to avoid rust.
French enamel pieces are doing quite well on eBay (see what sells here). In fact old antique and vintage enamel seems to be selling good, French or not. Especially containers and coffee pots.
Here are some pictures of my canister: