I’m I automatically the buyer when I offer the asking price (or more) and no other negotiations are taking place?
The asking price is an invitation to start negotiating or to make an offer. A seller first needs to decide whether he’s going to respond to the offer. That can lead to accepting the offer or making a counterbid. The seller will act according to the circumstances. It’s advisable to make a judgement on the way he’s likely to respond beforehand.