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

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