Missing condition attribute

Google defaults missing condition to 'new', but for refurbished/used inventory this leads to disapproval when shoppers receive a different condition than expected.

Used and refurbished sellers often forget the condition field, letting Google's default mismatch the actual product.

1. Always populate condition explicitly — never rely on the default.
2. Use 'new', 'refurbished', or 'used'.
3. For mixed inventory, condition is per-product, not account-wide.

• Letting 'new' default apply to a used-goods marketplace