Brand: Geek Customized, Cable length: 1.5M, Dimension: 293*103*40mm, Connection: Detachable USB Type-C Wired, 240mA, Model: GK64, Input: DC 5V, Swtich: Gateron Switch Brown Switch (Replaceable), Anti-ghost Key: All Keys, For Mac OS, Layout: 64 Key, Backlit: 16.8 Million Full Color RGB Backlight, Supported Systems: Win XP/7/8/10.
Basically copy coupon, view price history or create e-mail price alert. What is best price?
Aliexpress
There’re some similar (or not) items on Aliexpress
You can use link bot to get even lower price:
Click here to search by yourself. Here are coupons that you can use.
Latest price update (UTC time):
Banggood
Banggood warehouse is located in China. I don’t think there is an active coupon right now – at least in my database.
Link: Banggood product page
Price: $-3
It looks like this item is out of stock in Banggood. If you found it then please send me the link. I will replace it.
Click here to search on Banggood!
Additional Banggood coupons: first page and second page
There were country-specific coupon codes published on Couponsfromchina social channels and price alerts. Coupon price may vary by country, because there’re different VAT rates, shipping cost etc. There is a chance that some latest coupons are still working:
Old coupons (from the oldest to the newest): BGkj58d, BG3CSUM, bgssaff9, BGCPP009, AFfbG10, BGVDay10%off, Email3, BGAFF10OFF, BGTT10, bGhOnEy10, BGdragonBoat, BANGGOODSD
(you can check these old coupons out, but these probably won’t work)
Price history and price alert
Here is price history (for all/most countries) for Geek GK64 Mechanical Keyboard. The lowest price was: $54.99.
Price records source(s): Banggood
Click on image to enlarge. 
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)).