Most of the currently available high-end light meters have features that were not present on meters several years ago, such as flash-metering, either tethered, or untethered, and the ability to take several readings and integrate them together. Also, the lower volume of units sold, makes the per-unit price of manufacture higher. For many people who shoot digital, it is often easier to just shoot a test shot and look at the histogram, and this has caused a dwindling of sales of pro-level meters.