State the four methods of selling.

The four methods of selling are:

1. Sale by Inspection — The buyer inspects the goods before deciding to buy them. Suitable for non-standardised or perishable goods.
2. Sale by Description — Goods are sold through descriptions in catalogues, circulars and sales letters. Suitable for standardised goods.
3. Sale by Sample — A sample/specimen is shown to the buyer and a bulk order is placed on its basis. Used for foodgrains, tea, coffee, etc.
4. Sale on Approval or Return — The seller sends the goods to the buyer who, after checking them, may decide to buy them or return them.