It is always good to look at seller feedback before purchase (not just for tool purchases but any purchase). Other purchasers that got annoyed with condition will typically complain.
I am a CNC tech, and I use Wiha SL series insulated screwdrivers 90% of the time. The coating doesn't add to the blades diameter and still is 1000v rated. General use set is a 20yr old set of Snap On.