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