Shopping for food in my local ALDI yesterday I noticed they had reduced their OBD11 reader to £6.99 from £16.99 I appreciate not all ALDI shops price the same but worth a look if you are in one.
Dave Greaves
Amazon do the ELM327 ones for <£5 inc delivery... I've always had errors if I have them plugged in as I start the engine (ABS warning light comes on), but they've always worked a treat if I plug them in after the ignition is on... not perfect, but they're cheap and I know they work with TorquePro, ELMscan and ToyoSys.