Ping Sensor alternatives

I am looking for a ping sensor alternative coz its 30$! Has any one tried the HC SR04 in ebay sold from China for 2.5$? Is it good at all? :)

You get what you pay for on ebay. In my experience, it is hit or miss. If it works, then it works great. The HC SR04 is a good design when it is assembled carefully and correctly. But it can be a headache to try and troubleshoot a poorly soldered board. Buyer beware.

AyushChand: I am looking for a ping sensor alternative coz its 30$! Has any one tried the HC SR04 in ebay sold from China for 2.5$? Is it good at all? :)

I have a bunch of these sensors and they all work just fine. My NewPing library accommodates for the different styles of sensors out there so they all work the most effectively. Buy 3 of these sensors from 3 different vendors on eBay just to be sure. I did get a couple that don't like to work beyond about 100cm.

Tim