Offer up should rid itself of " is this available"

Level 1
Level 9
This has been discussed at lenght in the past.

Not the auto response itself, but why this message can be helpful.

Some sellers will do holds, others may be in the middle of a transaction and / or forget to mark items sold.

A few sellers will even have bidding wars right off the bat or mid chat.

So it's best to ask early on in some manner and get a response and feel for the potential transaction.