Websites: camelcamelcamel: Amazon item price history

camelcamelcamel is a cool (surprisingly, camel-branded) free online service to check the actual and past prices (historical prices, price dynamics etc.) for items on Amazon online marketplaces (including the regional sites).
For example, here is a link to the Amazon price history for the Fifty Shades of Grey (paperback book; somewhat NSFW, sorry):

• Fifty Shades of Grey: Book One of the Fifty Shades Trilogy (Fifty Shades of Grey Series) (0345803485) | Amazon price tracker / tracking, Amazon price history charts, Amazon price watches, Amazon price drop alerts | camelcamelcamel.com

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Last updated: 2019-09-10

Popular East Asian postal operators: international service rates

Here you can find the official retail service rates (or price calculators) for some popular East Asian postal operators (namely the most popular ones among online shops):

• China Post: in Chinese / in English
• Hongkong Post
  • EC-Ship (only tracked postage options)
• SingPost

See also: International shipments: tracking online