I don't mind and will check the shipping cost today if you PM me your address.
I recently shipped something I sold on ebay to Indonesia and learned that tracking information is only available using the more expensive "priority express international" and not the more economical "priority international".
I had to use the more expensive version to protect myself from the buyer potentially creating a fraudulent PayPal dispute because I would have otherwise had no way to prove the package was delivered.
If you pay me using Bitcoin or Monero, I'll use whatever shipping method you prefer. If you use PayPal, I'll have to go with the option that provides tracking.
Update: I checked the USPS price page and it looks like shipping to Singapore would be $57.25 or $61.90 depending on if the package weighed 2 or 3 lbs (the keyboard itself is 500g) if using the shipping method without tracking (Priority International) and $73.25 or $78.30 for the shipping method that includes tracking (Priority Express International). There appears to also be an even cheaper version that would cost $40.50 (First-Class Package International Service) but I'll have to go to my post office and confirm if that's correct.