I'm pretty sure I bought arrowheads from him once, but I remember running around South San d'Oria with a bunch of reasonably priced food in my bazaar (Meat, Fishkabobs, pies, juice) once. I check Taikobo and he checks me. I don't buy anything from him but he clears out my entire bazaar. o_O I of course /bow to him and send him a "{Thank you.}" tell.
I don't know... if the beastmen raid the towns and storm the castles, I'm sure Taikobo will still be there under that tree, doing whatever he's doing to the Chinese Mafia. ^^