Hi, my name is*****'m a certified appraiser, and I'd be happy to help.
Any marks anywhere, no matter how small?
How many in the set?
Ah, I see. These are Venetian Murano glass, and most likely from the 1920s or 1930s. Unfortunately, they are irreplaceable. They are hand blown, and it would be virtually impossible to find matches as each set was relatively unique.
I'd value the goblets at around $400 - $500 each. So if 13 are missing, then that's $5,200 - $6,500 for the missing items.
Unfortunately, I can't also appraise the vase in this question, because it was priced as one item. I could value it in a second question, if you have a photo of the bottom so I can see the mark.