Are 500 hours too many for a used hi-end cartridge?

If cartridge aging is an issue, then y'all need to know of this guy, who does phono cartridge repair and retipping.

http://www.phonocartridgeretipping.com/index.html

One thing to consider when buying a used cartridge, and I know that the folks trying to sell them will NOT like this! That is, it is fairly well known that just one (1) play of a record with a damaged stylus is going to ruin that record! So, if you want to sacrifice a record to see what the condition is like after that one play, no issue. Here's the question, is your record collection that valuable to you that you will risk the next record, or the next, if the stylus is  considerably worn and the result is a gradual destruction of your groove wall due to a 500+ hour stylus? 
Some may say that every time you play a record, you slightly damage the groove wall which is very possible, but why increase the likelihood of that happening with a known 500 hour+ stylus?

chakster

... if an LP can be destroyed from one play then all those 30-40 y.o. vintage LPs must be unlistenable, but they are better than new reissues. 

That's the logical fallacy known as the excluded middle. It's certainly true that an LP can be destroyed with a single play; it's absurd to suggest all 30-year-old records have been improperly played.

Then there's the advantage of often being able to get good sound out of a damaged record by using a more modern stylus profile.

Here's the question, is your record collection that valuable to you that you will risk the next record, or the next, if the stylus is  considerably worn and the result is a gradual destruction of your groove wall due to a 500+ hour stylus?

@cleeds Dave's statement is questionable because many audiogon users claimed they're fine with cartridges with 500hrs on it even if the profile is conical, they do believe "it is well polished".  

I'm fine with used vintage records purchased not from audiophiles, but from the record dealers and private collectors (if the condition is strong VG+ or better). Still better than 99% of the reissues.