Do any one have idea from where we can download ebay app for automation(demo). I downloaded one but its throwing error message

SLF4J: Class path contains multiple SLF4J bindings.
SLF4J: Found binding in [jar:file:/Users/syadav3/.m2/repository/org/slf4j/slf4j-log4j12/1.7.12/slf4j-log4j12-1.7.12.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: Found binding in [jar:file:/Users/syadav3/.m2/repository/org/slf4j/slf4j-simple/1.7.5/slf4j-simple-1.7.5.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for an explanation.
SLF4J: Actual binding is of type [org.slf4j.impl.Log4jLoggerFactory]
log4j:WARN No appenders could be found for logger (com.intuit.tools.common.testnglogger.ReportLoggerSuiteListner).
log4j:WARN Please initialize the log4j system properly.
log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info.
[1] example.Grabebaytest#SelectPickList: -
FAILED: SelectPickList
org.openqa.selenium.WebDriverException: An unknown server-side error occurred while processing the command. Original error: Could not find app apk at /Users/syadav3/Desktop/AppiumAutomation/grabebay.apk (WARNING: The server did not provide any stacktrace information)
Command duration or timeout: 428 milliseconds
Build info: version: ‘2.46.0’, revision: ‘87c69e2’, time: ‘2015-06-04 16:17:10’
System info: host: ‘BANL142a7ca0d.local’, ip: ‘192.168.253.1’, os.name: ‘Mac OS X’, os.arch: ‘x86_64’, os.version: ‘10.11.6’, java.version: ‘1.7.0_79’
Driver info: io.appium.java_client.android.AndroidDriver
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:526)
at org.openqa.selenium.remote.ErrorHandler.createThrowable(ErrorHandler.java:204)