Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
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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: ["Content removal", "Unilateral change", "Contract by using", "Arbitration", "Limitation of liability", "None", "Jurisdiction", "Choice of law", "Unilateral termination"].