Rear Wheel Speed Sensors

[Synclare]

Anyone have a suggestion on where to buy reasonably priced rear wheel speed sensors for a year 2000 2 litre Z3, can't believe they're around 50 quid each!!
The ABS light is on, connecting to a MaxySis diagnostic scanner via Bluetooth and driving the car shows no output from either rear wheel. I've taken the connectors apart to clean and reconnect but no difference, As usual they are stuck in to the hub. Need to eliminate them to see if there is then a fault in the ABS module

 

[simonlincs]

I fitted 1 from here, working fine at the moment, was a good ebay process, but as ever you pay your money and take the chance http://ebay.us/dd6jug

 

[Will_460cs]

Wheel speed sensor vary a lot in quality I wouldn't trust a no brand one but maybe I'm in the minority.....

I just got a Delphi (OE quality) one here yesterday, there normally @65 quid from the motor factors:

http://www.ebay.co.uk/itm/391065623837?_trksid=p2060353.m2749.l2649&ssPageName=STRK:MEBIDX:IT

That was the cheapest I could find.....

Erst and Wahl are making the £20 ones and they tend to be hit and miss....