[quote=@King Cosmos]
[@Double] also worth noting that the Earth Dragon Balls can only bring someone back to life once. Which was why Yamcha dying to the Saibaman was such a big deal because he had already died once and couldn't be resurrected a second time.

Actually, that might have been the whole reason they went to Namek in the first place? Since their Dragon Balls were stronger and could be used to resurrect people multiple times? I don't know, it's been a while.
[/quote]

I think it was Ciaotzu that had already died once? I forget. But I do know that the reason they went to Namek was because Piccolo (and by extension, Kami) died and thus the Earth Dragon Balls vanished.

It's not even that Shenron couldn't resurrect someone twice. I believe the exact words were that he couldn't grant the same wish twice. So for instance, he couldn't even give Oolong another pair of underwear because he granted that wish once already. Weird limitation but then again Shenron's rules about wishes tended to get a little weirder as time went on. And that's not even mentioning GT where there was suddenly a set of Black Star Dragon Balls with no explanation for the their origin and the actual evil Shenrons that came about later because granting wishes apparently corrupts the Balls? Moral of the story is GT was stupid. <_<