bujing and selling goods

hi friend steemit,
we live this pesti buy a goids that bermafaat for aurselves so that we ara legitimate use,
as for various kinds of buying and selling are allowed among
orhers:

1.selling greetings or orders.
That is: namely buying and sekling by way of advance in advance of the miney the-the goods are brought bock in accordance with the charecteristics that have been agreed together.
2.buying and selling barter.
That is : buying and selling by exchanging goods with fruits. zaman first people do buying and selling like this, but now many people leave it because there is already a currency ir credit card as a tool of exchange more easily and effectively.

1. absolute sale and purchace.
   That is: buying and selling simething that has been agreed as a means of exchange,such as:money.
   4.buying and selling al mus'awah.
   That si: selling menyembuyikan price of origin, but the two people who adad mutual meridai, jal buy like this is growing non.
2. Sole and purehase cash.
   That is: buying and silling of a merchandising cash
3. sela and purchace of credit.
   That is: buying and selling of amerchandising ltem
   7.sela and purchase auction.
   That is: buying and selling in front of crowds with borgaining or overcoming led by auction officials.