TPMS broke

I've found OEM on ebay but the price is almost half dealership price. Should I go with it?
http://www.ebay.com/itm/OEM-TPMS-07-12-Mercedes-C-CL-CLS-E-GL-GLK-ML-R-S-SLK-Tire-Pressure-Sensor-D090-/271171583870?pt=Motors_Car_Truck_Parts_Accessories&fits=Model%3AC300&hash=item3f2315ff7e&vxp=mtr



