The value on these can range from $300 per matching compote and saucer to $1200 per single matching compote and saucer set. In order for me to properly assess the value of what you have, I would need to see images of one matching set and a clear, in-focus photo of the signature. Please send the photos at your convenience. There is not an extra charge to provide more pictures here.
As for selling, the best method would be through an auction house such as Rago or Fontaine's. It is free to contact auction houses through their website to enquire about possible consignment and sale estimate. Here are the links for you to those auction houses:
Another method would be through Ebay. It is where a very large amount of collectors would first search to find Tiffany Glass.
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