DealExtreme / dx.com is a Hong Kong gadget site with thousands and thousands of China products of all kinds, often at very competitive prices. Every order is free of shipping charges, even if you buy a $1 item. It makes it easy to order and forget. The only downside is the shipping time, which sometimes can be around three to four weeks; some things might arrive earlier, though.

Here are the items I've bought for myself and others so far, followed my wish list, or list of items which might be interesting. The order list can be download in CSV form, while the wish list had to be scraped. For what it's worth, here is a small Python script which does that, plus a bash script for HTML rendering of image links and product descriptions.

The Python script uses WebDriver / Selenium, and install for that goes:
sudo apt-get install python-pip
sudo easy_install selenium

Orders

Genuine Acecamp 2429 20L Outdoor Water Resistant Dry Bag - Yellow1000mA Car Cigarette Powered USB Adapter/Charger (DC 12V/24V)DIY 433MHz Wireless Receiving Module for Arduino - Green433MHz Wireless Transmitter Module Superregeneration for Arduino - GreenDIY 16-Key AD Keypad Module - Blue4 x 4 Matrix Switch Module - GreenES-71 II Lens Hood for CanonMini Prototype Printed Circuit Board Breadboard for Arduino (5 PCS)Ceramic Capacitor for DIY Electronic Circuit - Red (270-Piece Pack)Solderless Breadboard with 400 Tie-Point (White)USB to RS232 Serial Port Adapter (Transparent Green)Freaduino Soil Humidity Sensor for Arduino - WhiteDouble-Sided Glass Fiber Prototyping PCB Universal Board (3 x 7 / 5-Piece Pack)DIY HR-202 Humidity Detection Sensor Module - BlueAluminum Alloy Straight Hot Shoe Flash Bracket for Camera - BlackFlash Diffuser for Canon 580 EX / EX II / YongNuo YN560 / YN565 Speedlite (3 PCS)HT RJ45 RJ11 Cable TesterStainless Steel 1/4Mini USB 2.4GHz 150Mbps 802.11b/g/n WiFi Wireless Network Card Adapter - BlackUSB 2.0 2.4GHz 802.11b/g/n 150Mbps WiFi/WLAN Wireless Network AdapterUltra-Mini Nano USB 2.0 802.11n 150Mbps Wifi/WLAN Wireless Network Adapter6.3V 3300uf Aluminum Motherboard Capacitors (20-Piece Pack)DIY ZIF DIP IC Socket Set - Green (8 PCS)Solder Tip Refresher3-Pin Triode Transistor for DIY Project - Black (20 x 10-Piece Pack)Aluminum Electrolytic Capacitor for DIY Project (120-Piece Pack)DisplayPort DP Male to HDMI Female Adapter Cable - Black (15CM)Gold Plated 1080i HDMI V1.3 M-M Connection Cable (1M-Length)11x12 132-Panel Brain Teaser Magic IQ BallMicro USB To HDMI MHL Adapter - Black Gold Plated HDMI Male to DVI 24+1 Female Adapter62mm Digital Camera Lens Cover Digital Camera Lens Cover/Cap with Strap for Canon (62mm)

Interesting

Portable Dapper Stage Red/Green Laser Light Show - Blue + White (2 x AAA)Protective Plastic Case for 2.5Protective Plastic Case for 3.550mW Green + 100mW Red Laser Stage Lighting Projector with IR Remote + Tripod (100V~240V AC)Arduino Compatible Nano V3.0USB to RS232 Adapter Cable (1M-Length)RS232 Serial Port Express Card Adapter - Blue + Black + SilverPL2303HX Converter USB to TTL USB to COM Cable Module- Black (1m)Plastic Imine Membrane Screw Insulation Coat - White (1000 PCS)DIY 3mm Iron Hexagon Nut - Silver (200 PCS)2A Ceramic Tube Fuse Set (100-Piece Pack / 6 x 30mm)RGB LED Strip Control Box w/ IR 24-Key Remote Control (DC 12V)44-Key IR Remote Controller for LED Light Strip - White24-Compartment Free Combination Plastic Storage Box for Hardware Tools / GadgetsRemovable Dividers 40-Compartment Plastic Storage for Small Gadgets36-Compartment Free Combination Plastic Storage Box for Hardware Tools / GadgetsEKB-108 Plastic Battery Box for 10 x AA / AAA - Translucent WhiteStylish Anti-Slip Shoulder Strap for Canon DSLR Camera - RedMini Portable Metal Flash Holder Mount for Camera - BlackL-Shape Flash Bracket for Camera (2-Piece Set)Aluminum Alloy Straight Hot Shoe Flash Bracket for Camera - BlackFotomate 250mm Movable Range 2 Way Macro Focusing Rail Slider1/4433MHz 4-Channel Wireless Flash Trigger (1 x 12V 23A + 2 x AAA)433MHz 4-Channel Wireless Flash Trigger (1 x 12V 23A + 2 x AAA)Plastic Buckle Clip for High Power 220V SMD 3528 LED Flexible Strip - Transparent (10 PCS)DIY HR-202 Humidity Detection Sensor Module - Blue6490 DHT11 Humidity Temperature Sensor Module - Blue20 x 80mm Double-Sided PCB Prototype Boards (25 PCS)Double-Sided Glass Fiber Prototyping PCB Universal Board (10 x 16)Double-Sided Glass Fiber Prototyping PCB Universal Board (7 x 9)Electrical Bakelite Circuit Board (5x7cm/10-Piece)Double-Sided Glass Fiber Prototyping PCB Universal Board (3 x 7 / 5-Piece Pack)DS1307 I2C RTC DS1307 24C32 Real Time Clock Module for Arduino - BlueXL7105-SY DIY 2.4GHz A7105 NRF24L01 Wireless Module for Arduino - Green (2 PCS)2.4GHz NRF24L01+ Wireless Communication Module for Arduino - Green (2 PCS)433MHz Wireless Transmitter Module Superregeneration for Arduino - GreenDIY 433MHz Wireless Receiving Module for Arduino - GreenDIY DS18B20 Stainless Steel Temperature Sensor Probe - BlackDHT21/AM2301 Capacitive Digital Temperature & Humidity Sensor - BlackENC28J60 Ethernet Module for Arduino - WhiteHR31 Humidity Sensor Module for Arduino - BlueNRF905 Wireless Communication Transmission Module for Arduino2 Channel 4 Pins NC Type Shock Switch Sensor ModuleVibration Alarm Sensor Module for Arduino - BlackBMP085 Altimeter Atmospheric Pressure Module for ArduinoHuman Body Touch Sensor Module for Arduino - Black + BlueDS1302 Real Time Clock Module with Battery CR2032DS18B20 Temperature Sensor - Black + SilverMicro SD Card Storage Memory Board Module for ArduinoArduino Compatible Digital Vibration Switch Sensor ModuleArduino Tilt Switch Sensor Module - BlackArduino Compatible 3-Pin Light Sensor Module - RedArduino Compatible DHT22 2302 Digital Temperature Humidity SensorDS18B20 Digital Temperature Sensor Module for Arduino (-55~125IR Receiver Module Wireless Remote Control Kit for Arduino (1 x CR2025)Arduino 5V Relay Module - Blue + BlackDHT11 Arduino Compatible Digital Temperature Humidity Sensor ModuleFreaduino Soil Humidity Sensor for Arduino - WhiteHall Effect Magnetic Sensor Module for Arduino (DC 5V)MMA8451 3-Axial Triaxial Digital Accelerometer ModuleArduino 3-Axis Digital Gyroscope Sensor Module - Blue