The IC tester I have at shows is basically the same idea as the eBay link. However, countless hours have been spent with the manufacturer to ensure most any pinball related IC you can throw at it were included in its abilities.
Mine will do most all 74xx series TTL ICs, CMOS ICs, literally into the thousands of chips and anything I could possibly think of for pinball related repairs. This includes the common failure WPC switch matrix ICs, LM339, ULN2803 and others.
It's a fantastic tool and the only thing comparable that I'm aware of, are not at all portable, and cost upwards of $600-$1000 if you can find them used.
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Rob Anthony
Pinball Classics
http://LockWhenLit.com
Quality Board Work - In Home Service
borygard at gmail dot com