There is bot on Sarga: Jack Kobe -- he just sits at the burning wall where 2 Golden Fleece spawn at the south entrance. He spins in a robotic circle all day long attacking them as 50 ARC, spiritbonding mostly crafting gear.

You can trade with him and he'll stop as long as you have the trade window open - he never cancels it.

I've reported him a dozen times and give up. He's singlehandedly crashing the III level materia market on Sarga. He just floods the market with the stuff.

He's been there for weeks.