I promised myself I'd give the Gardening Shears a try before I knocked them.
But over dozens of games, I've never had even the slightest urge to buy them. They're only useful in a small fraction of dungeons; they cost about as much as two normal items and provide a benefit that's marginal even if you find it early on a map like Ick or (maybe) Rock Garden.
Am I missing something? I don't have anything vetoed currently, because I like to have weird options available, but so much of the time the Shears are just a dead shop.
P.S. Dragon Soul is my favorite prep ever since it changed to its current behavior. So much fun.