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I also have many bridesmaids (7). I've found some great and reasonable (but nice) jewelry on etsy for my girls. PM me if you are interested in some of the sellers I've used and had positive experiences with.Also, it can be dangerous, but you may try shopping sales at the mall... depending on what you're looking for.
The seller I bought my girls' earrings from has been on vacation for 2 months (I'd like to get them something else from the same seller so that all their items match), so I'm definitely feeling your pain. Good luck!