Give us an option to report spammers in market.

I have been spammed for 3+ hours by a guy willing to buy me an item, for an extremely lower price than I had put (10 to 20c for a belt listed 40c). I already was low on the prices, so I refused, but he kept on spamming.
In the end he even insulted me in the note, because I refused to down my price.

Worst thing is that I cannot just block him from this offer or report him. Give us an option to do it, other than putting our item out of the market.

Please, give us a way to deal with this kind of comportement. It's not the first time, and likely not the last time.

Thanks.