Values of dinnerware like Limoges Tressemann and Vogt (that's the T&V) can be found at Kovels or Replacements online. Individual pieces sell for a variety of prices including a creamer for $27.00. A demitasse saucer without a cup is valued at about $3.99 while a cup and saucer together are valued at $24.99.
Remember that if you decide to sell your Limoges to or through a dealer, you will not obtain the stated value of each piece. A dealer must cover expenses like overhead, and of course, make a profit. Expect a dealer to want 1/3 to 1/2 of sold price. Also, keep in mind that a dealer would price an item based on what he thinks it will sell for, as prices can vary depending on where you live. Some shops that sell on consignment will discount the price if the items sit unsold for some time.