i am looking for a tire pressure gauge. just wondering if those digital tire pressure gauges on ebay work accurately or not?

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No, the digitals that have 0.5 psi increments are not adequate. Buy a regualar analog guage with nice big graduations. And use a quality guage to check its accuracy. And always use the same guage, as not all guages are created equal.

 

I had them as standard equipment in my 2003 350Z Track, and they are the greatest thing since sliced bread. If you got a slow leak due to a nail, you will know about it long before the tire goes KERBLEWEY!

 

depends on the quality of the gauge. Check the manual or specs for a precision/accuracy number. If it's not listed or more than +/- 0.1 psi, forget it.