Audiogon etiquette question

first - APOLOGIES - I know this isn't the right forum subsection but there seems to be no appropriate section to post under.

My problem is this:
I've been writing a seller (twice now maybe?) for the last 30 or so hours about an item they just posted for sale. I told them I wanted it and asked if it was still available and how to proceed. But no answer - I guess they COULD be away (?) but it seems odd to me. Is there any sort of process anyone can recommend to follow? I"m a bit frustrated here.