I saw similair ones to that on ebay but they werent branded and just looked like knock off 'made in china' bits of kit which are never good. Got this

Essentials pH Pen / Meter Hydroponics - Free Delivery on eBay (end time 01-Jan-11 15:42:09 GMT)

Set me back a little £35 which is about $55. I think its pretty good, completely water proof, beeps nd stuff and feels like a qualitiy build.

Agree with the reflector...its no1 on my shopping list, closley followed by a replacement red bulb and another veg bulb. C