Why not buyer books a flight to seller's city and physically checks the good and takes them back home himself.
In case the shipping detail is fake, and item is not delivered to buyer within the timeline, paisapay refunds money to buyer, so whats the issue in it.
A lot can learnt by understanding the system first and further on suggestions can be put forward, please do not simply brainstorm ideas without fully understanding how things are moving currently.
There are many issues which are currently being faced by buyers and sellers these days. Use them to bring out the best consultant self of you.
eg-
1-Neutral feedback revision for sellers
2-Free gifts not being delivered to buyers.