Don't price yourself out of the market! If you are are listing a domain name, and choose to add a minimum offer, make it accessible. If you set a minimum offer too high, you risk not attracting any offers at all. A listing with activity is far more attractive to buyers than a listing without. Additionally, setting too high a target/buy now price could deter offers being made on your domain name.
When placing offers on domain names, be realistic! If you are placing an offer on a highly sought after, premium or generic domain name, bear in mind the target price set, and place a reasonable offer accordingly.
Encourage offers, and promote your listings. The more exposure your domain name has, the more chances of attracting a buyer. Build links and increase traffic to your listings to get increase your Quality Index.
Take notice of counter offers. Entice buyers in to increasing their offer with an appropriate counter offer. Counter offers are are not made public, and only visible to the offerer, and the seller.
Once a sale is agreed, it is highly recommended to check the domain owner WhoIs details in the AU registry before any funds are transferred.