Vintage Three Strand Freshwater Pearl Necklace 18"

This is a beautiful three-strand freshwater pearl necklace. It is in excellent condition. It was my grandmother's and she took very good care of it. The pearls are a very soft barely-pink color. Filigree clasp in sterling silver. 18" length. I've seen very similar (perhaps even the same one) for sale for up to $3500. I'm not certain of the exact brand however and I want it to be accessible to lovely fashionistas on a more reasonable budget, therefore I am looking for around $400-$500 at the moment, but we may be able to make a deal. I'm a reasonable woman. Message me with any questions you may have or if you'd like to make an offer. Thanks for taking the time to look!