About the trading system

Is it possible like this?
Current face-to-face transaction retention
Add a new system
Buyers can send purchase requests for the corresponding products
Once the seller is online, one can refuse or trade:
1. Face-to-face transaction

2, one-click mailing


To avoid conflicts with GGG's trading philosophy, this system can only be used after the seller goes offline. At the same time, offline transactions will increase the built-in cooldown, and buyers can only send N purchase requests within a certain period. A one-click postage will charge both parties a certain percentage of gold coins

I am not an English player, please understand if the translation is not accurate