I think it depends on the website. Sometimes they make the link where if you roll the mouse over it it will give you the price range. If it doesn't let you do that there might be a place on the website that says it. I'm not really sure. Sorry, that was no help at all huh?
Sadly in the world of weddings I would guess each $ = $1000 roughly. Thats just a guess though, if it's a dress that you're really considering, find a retailer in your area and call and ask about that dress. Good Luck!