Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
if we fail to comply with these terms , we will be liable to you only for the purchase price of the products in question . 

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