Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
this right does not apply to any goods that have been used , or are stated by us to be non-returnable , including any items or goods that have been personalised or modified in accordance with your instructions . 

```
. OPTIONS: ['Choice of law' 'Unilateral change' 'Contract by using' 'None'
 'Limitation of liability' 'Arbitration' 'Content removal' 'Jurisdiction'
 'Unilateral termination'].