The answer is Amazon.co.jp, of course! Although you can find some cheaper units in big department, garages or electronics stores like Yamada Denki, the price will still be significantly more than 20,000. On Amazon you can find the real budget options, and better deals on what you see in the shops.
You can see the most popular Navi units here. I actually recently purchased what is currently number two. It isn't the absolute cheapest (which is this little fella at about 6,500yen), but in terms of size and positive reviews, it seemed like the best option:
|This is a great unit. All the documentation is in English and the price is great at about 14,000yen.|
- The difference between the expensive Navis and these is that this type is designed to sit on your dashboard, while the expensive ones are really a souped-up entertainment system which is installed into the dash of your car (like this beast for 93,000yen), featuring Bluetooth, CD/MD/DVD capabilities, TV etc etc.
- One problem you may come across is that map data and options are almost universally Japanese. If you have something to refer to and can read hiragana and katakana, this shouldn't be too much of a problem. Map data IS available in English, and you may get lucky with your unit - check the manufacturers website for details.
- A good feature of the newer portable GPS units is that the map data is read from an SD card, so you can update it very, very easily. Some of the in-car units require, if not a specialist, the purchase of a new data CD (very expensive).
- Other very cheap units come from manufacturer Space Machine