How to offer on Posh.. and about lowball offers!

Most posh users have to mark up there retail product 20%... we love it when you take that in to account when you offer. Lowball offers are generally anything lower than %20. For instance.. if an item is $50...you have a high chance to get me to accept your offer if you offer $40-$45.. but if you offer below 20% you will likely be declined because we need to make a profit too! Please keep this in mind! Lowball offers are not ok! Thank you :)