All in one ppm ph ec

Can anyone give me a good place to buy an all in one meter for my DWC grow, and also a price range for a good quality one, saw one on ebay for 103.00 but didnt seem to have a brand name and couldnt research the quality. Any help would be appreciated.

hanna or oakton are good brands $120-up

hanna makes a pretty decient one. all in one pen. the price is around 150-160 bucks.

This is the one I was looking at any thoughts?
http://www.ebay.com/itm/LCD-PH-PPM-Temp-EC-CF-Water-Hydroponic-Aquarium-Meter-Digital-Tester-Monitor-TDS-/160684216403?pt=LH_DefaultDomain_0&hash=item2569869053

I am as well. Bump. Need some input.

*Disregard it blows at reading PH