Sexier lipgloss is pretty hard to come by, if it's still good (as it's getting pretty old now!)
In terms of the MSFs Petticoat won't go for much more than retail as it's pretty easy to come by, and I think, part of the permament mineralised rotation.
Stereo rose is being repromoted in one of the summer collections, so again, people may hold out for this if it's a large amount over retail.
Metal rock is much sought after. I saw one sell for about $85 recently.
And the pink 239 you should be able to sell for a bit too. There's always people looking for them, but they hardly ever get sold!