Receipt/Invoice for Secondhand Goods

[Becsworld]

Hello,

If I buy a secondhand item off ebay or Gumtree from a seller who doesn't have an ABN what kind of information does the ATO need to accept it as a valid purchase? (for depreciation)
Do I need to have the seller complete the ATO form about this being a hobby and not a business so as to not take withholding tax for not providing an ABN?

Thanks in advance,

Bec.

 

[MRO]

What is the value of the item.

For small items i just print the add out and attach my payment record. Obviously as the value increases the need for more documentary evidence increases.