Broken power button on iMac G4

I am considering the purchase of this iMac. It has a broken power button. What are the implications of this? The present owner says that he just plugs it in and it starts up, and that besides he just leaves it on all the time anyway. How big of an issue is this? Can you advise me on how easy a power button might be to repair or if it is very necessary to repair it (assuming their is a workaround-keyboard startup?).
Thanks in advance!

Given the said iMacG4 model and year are not discussed, one possibility
may be to buy a third-party for Apple Macintosh keyboard with power key.
If nothing else is wrong with the computer, it may run awhile without trouble;
but access to the physical power key (on the logic board; may be hard to
buy the part by itself to replace it) is handy in troubleshooting or restarting
when something freezes up. Unplugging and re-plugging the iMacG4 to
make it go/make it stop is not recommended. Issues can result; I am
aware of a few problems in the G4 and earlier G3 iMacs and others, due
to the owner unplugging the machine instead of performing maintenance
or repairs in a timely and orderly fashion.
Since that machine is likely no longer covered under an AppleCare Plan,
you could either have someone else eventually replace the logic board
or other parts as you find them; or if you are technically minded and have
a good attention to detail with adequate work habits, fix it yourself. The
service manual, a download in PDF for techs, may still be available. It
was intended for trained personnel, and damages worse than the first
problem may result from improper procedures being done inside the iMac.
That said; good luck & happy computing!

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