It makes sense for resources, as it discourages market manipulation and constant undercutting. Gear, however, should not have this same restriction. Lots of gear options on the market is a great thing for buyers, and should be encouraged as much as possible.
Often times it’s difficult to know how much a piece of gear is worth, so with the current system you have to take a guess and hope that it sells otherwise you’re out thousands of gold in listing fees. This can be solved by either removing the listing fee for weapons and armor (quick solution), or creating a bidding system (better solution but requires dev work).