I sold a pair of oakley square wires here for $80. Well no, scratch that, 65 b/c the buyer wanted to do some haggling AFTER he received the sunglasses and AFTER he agreed on the price :|. Those retailed for $150, so I think you can look at getting roughly half the retail price on them if they're in good condition. Considering romeos are bout 280-300, I'd say you could get 130-150. If you sell on ebay already, I'd suggest that, since there are more less knowledgeable people there.
BTW, I am guilty of spending $200+ on a pair of Juliets. I think they're a great pair of sunglasses, definitely not worth 275, but after I tried them on, I was hooked. Luckily the sale of my square wires helped out a bit, along with my other sales on this forum 🙂. Don't diss the glasses unless you've tried them on. And I've tried on plenty of them in helping to make my decision, believe me 😀. What pisses me off is that oakleys never go on sale and are never discounted, and they are so hard to resell