Take a look at the chart below (taken from Wikipedia) Note the hardness difference between annealed copper and cold rolled copper. The imports use recycled annealed copper. We use only cold rolled virgin USA mined copper. Now look at the yield strength and tensile strength differences. You can see that the differences are very significant. I am not aware of any other copper sink manufacturer that uses 14 gauge cold rolled copper.
Below, see a Native Trails copper sink. Arguably the best selling of all copper sinks on the market. The best price I could find online is below - a discounted price for a 33" copper farm sink is $2193.75 with free shipping. The price on their sink is roughly the same as my sink. (Made in Mexico with annealed recycled copper) Our sinks are made right here in Florida of pure virgin 14 gauge American cold rolled copper. Our sinks require NO drying after each use, as suggested by almost all of the imports. Keep in mind, the workers in Mexico are making about 100 pesos a day - that converts to $8.00 per DAY of work. My highly skilled metal workers make several times that amount per HOUR!
Now, let's look at the specifications... Below, find the specifications for their 33" sink on the left and mine on the right.. They have a very thick apron on their sinks. It is a full 3 1/2" thick. That pushes you further away from the work area than an under mount sink. That defeats the ergonomic value of an apron sink. The ergonomic value of a farm sink is that you can work closer to the sink bowl - keeping you from bending and reaching to work in the sink. Our apron thickness is 1 1/2". You work 60% closer to the bowl with our design. Secondly their drain is smack in the middle of the bowl. There is no logical reasoning behind this location,. As soon as you put anything large in the sink, you are covering the drain. Our drain is ergonomically placed in the rear corner. You can wash on the right, and set off to dry on the left. Lastly, the Native Trails design wastes a significant amount of valuable real estate. Their interior only measures 17" wide and 28" long. Our 33" sink width is 17 1/2" by 31" long. Our 33" sink has 14% more usable space! (28" by 17 1/2"). Not only that, but the bottom of my sink is flat all the way to the sides. The imports have large radii that make it impossible to place glasses near the side of the sink - wasting even more space.
Lastly, look close at their online photos of installed sinks. You will notice that almost all of the sinks have issues with lining up with adjacent cabinets (sinks out of square) and also the sinks will show varying reveals at the counter top because the sinks are hardly every true and square.