The Kindle e-reader, from the Paperwhite to special-offer removal.
On Amazon, a Kindle Paperwhite with Special Offers is US$20 cheaper than without. I recommend buying the Special Offers version, since the ads can be removed afterwards. Just register your Kindle to your Amazon.com account, then request removal.
The Kindle Paperwhite E-reader (2016) retails on Amazon for US$119.99, but it doesn't ship to Singapore directly, so you'll need a freight forwarder. Alternatively, the local SG E-Reader Shop sells it for a reasonable S$209 with free shipping.