Hmm yeah i found out a couple days ago replying on the buy/sell is up... Never seen it that way.
Reply with care... That's an ideal. But i'm sure by next week there'll be comments like, wah so expensive, i think no one will buy... Or, ' eh so cheap, i think confirm fake', or even 'eh i message this guy never reply, all don't buy from him!'
Hopefully not though. I am still of the opinion that communicating through PM is better.