Just check coupons out (with price alert and history). Best price?
100 percent PC alloy, Polyester Lining, TSA customs lock, White color
Aliexpress
There’re some similar (or not) items on Aliexpress
Click here to search by yourself. Here are coupons that you can use.
Latest price update (UTC time):
Price history and price alert
Check out price history chart (for all/most countries) for Xiaomi 90FUN PC Suitcase 24inch White.
Price records source(s): Gearbest
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You can set price alert (for Banggood and Aliexpress (only if product name will be the same as on Banggood and I will post it on social media though, so it’s more like Banggood price alert)).