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The silhouette you see at the bottom is called an "An Hua" which translates to a secret or hidden decoration. This was a very popular feature to add to porcelain made for the tourist trade.
If all of the pieces are in excellent condition with no chips or cracks the complete set would sell in an antique shop or other resale venue for $100-$125 USD.
The price can vary depending upon the region in which sold and one other thing is that the market is pretty low for this type of porcelain.
Please let me know if you have any additional questions on your tea set. I am here to work with you to fully respond to your question.
Thank you, Michelle