前幾天的 Hacker News 上看到的消息：「Refreshingly honest – Digitec Galaxus now displays warranty score and return rate」，瑞士最大的線上購物平台 Digitec Galaxus 決定公開維修相關的資訊，討論在「Digitec Galaxus now displays warranty score and return rate (galaxus.ch)」這邊可以看到。

從文章裡面可以看到說明的圖片，主要是公開了一些數字，第一個是 return rate (退貨率)：

再來是故障的資訊：

然後是維修時間：

這邊隨便抓了「ASUS ROG Strix GeForce RTX 4070 Ti OC Edition」這個看，可以看到這三個資訊：

另外在 Hacker News 討論裡面看到一些有趣的資訊，像是歐盟強制降價需要提供至少三十天價錢的歷史記錄 (但要注意瑞士不是歐盟成員國)：

This is now a law enforced in European Union to display such history (at least the lowest price in last 30 or more days so customer knows if the price was not fake rised just before lowering it and calling it a sale). WooCommerce has a plugin for that now.

搜尋後可以找到應該是出自「EUR-Lex - 52021XC1229(06) - EN - EUR-Lex」這邊的 Article 6a：

1. Any announcement of a price reduction shall indicate the prior price applied by the trader for a determined period of time prior to the application of the price reduction.

2. The prior price means the lowest price applied by the trader during a period of time not shorter than 30 days prior to the application of the price reduction.

3. Member States may provide for different rules for goods which are liable to deteriorate or expire rapidly.

4. Where the product has been on the market for less than 30 days, Member States may also provide for a shorter period of time than the period specified in paragraph 2.

5. Member States may provide that, when the price reduction is progressively increased, the prior price is the price without the price reduction before the first application of the price reduction;

台灣的話因為沒有法令強制，目前需要透過第三方服務去追，像是 twbuyer.info 之類的服務，但就只有大平台才有提供了。

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