as you can see, couple of weeks ago I asked about tire pressure guages. Since I had 4 and none read the same. well, upon advice, I bought a couple of new ones. one I paid 3.95 + shipping on Ebay and one I bought from Amazon.com for 17.00 + shipping. the 3.95 one reads 3 lbs less than the higher cost one!! Get what you pay for???