Trade cost

Trade are grouped as follows:

You can trade 20 times the same item.

It gets expensive when creating multiple trade, so wait till you no longer have an active trade in the 'your trades' tab.

This is about active simultaneous trade, not the total of trades you have ever made.

First trade:        Free

Second:             100

Third:                 300

Fourth:               700

Fifth:                 1500

Sixth:                3100

Seventh:          6300

Eight:             12700

Ninth:             25500

Tenth:            51100

Eleventh:     102300

Twelth:        204700

Thirteenth:  409500

Fourteenth: 819100

Fifteenth:   1638300