If you want to buy a good quality stainless steel sink, look at the series. The 300 series is considered the best; it is especially true for 304 stainless steel. The 200 series is decent too, but not as good as the 300 ones. However, the 400 series is costlier but not suitable for making kitchen sink as they are susceptible to rust and corrosion. You should also look at its gauge. Lower gauges like 14 and 16 are thicker, higher gauges are thinner and are of better quality.