To start with, the best way is sending images of the material you wish to sell to our e-address
[email protected] . It will probably allow us to give you a first approximate estimation of the value in the market; if such estimation is not possible – depending on the nature and characteristics of the matter – we will ask you to ship it for a physical examen.
If the material is suitable for auction, you can ship it via postal service or any courier agency. Any way you choose, they should provide - and you must keep – a receipt.