Can someone please tell me how much these bracelets are? It's a Vintage 1984 Tiffany & Co Italy Sterling Silver Heart and Arrow Round Clasping link toggle bracelet weight 30 grams.

Two or 3 just sold on ebay for $143 - 152 (included box or bag).
If puffy hearts instead of links for the bracelet part, a bit over $200.

The price you get will depend where and when you list it. I would sell it on ebay very early November.