This is a rebadged Mitac Mio 168 (also sold as a Medion MDPPC150, Navman PIN 300, MicroMaxx 150, etc). Back in 2005 this was one of the first Windows PDAs with a built-in GPS, so the hardware is a bit datd but works beautifully. There's no Bluetooth or Wifi, but there's an infra-red port and a USB sync cable plus a MMC/SD card slot (which is claimed to be SDIO capable). The 300MHz processor was mid-range at the time and is low-end now. THe GPS unit is by SiRF and while it's a couple of generations old it still does a god job.

On the other hand, the navigator software is of variable quality. I find Medion Navigator to be good, Mitac's MioMap less so - and from the other reviews it sounds as though Falk Navigator isn't the best. I've successfully run Destinator on one of these and I daresay that you could install TomTom or iGo or whatever your preferred package is, provided it runs on Windows Mobile 2003.

One common failure on these is the plug at the bottom that is used for charging and PC sync. There are various solutions to this, from professional repairs to DIY socket replacement (the soldering is possible but fiddly) or there's the more drastic option of replacing the original socket witha different design, say mini-USB. All these options can be found on the web with a bit of Googling. Batteries are also getting a bit old, but again replacements are readily available and can be replaced in 10-15 minutes with a screwdriver and some care.

Used, these PDAs seem to go for £30 to £60 on eBay, depending on the condition and on what accessories are bundled. Mitac and Medion branded ones fetch the most, with Navman a close second and the other brands bringing up the rear, which is useful to know once you realise they're all identical apart under the skin.

These days there's no way one of these is worth £300, but at eBay prices, if you want a GPS PDA there's no reason not to buy one!