what is the average cost of a 1/4 carat 3 stone diamond ring?

This person had the following question about engagement rings:
im not talking about like amazon and overstock, Im talking about the average cost at a real jewerly store.

ring would look like this with smaller diamonds on the side

http://cdn2.overstock.com/images/products/L11990454.jpg

• 14k White Gold Fancy Ladies’ Three Stone Diamond Ring, w/ 0.92 Carat Invisible Set Diamonds, 3/16″ wide
• Three Stone Diamond Ring 1/2 Carat in 14K White Gold
• $1549 YELLOW GOLD 3 stone diamond 1.43 carat ring engagement
• 2 ctw Princess Cut Three Stone Diamond Ring in 14K White or Yellow Gold
• 1 ctw Princess Cut Three Stone Diamond Ring in 14K White or Yellow Gold
• 1.5 ctw Princess Cut Three Stone Diamond Ring in 14K White or Yellow Gold
• 1.75 ctw Princess Cut Three Stone Diamond Ring in 14K White or Yellow Gold