Data quality on Scoville is unfortunately garbage; Testing is expensive and both individual plants and individual growers/fields are highly variable, so nearly everyone is playing 'telephone' making subjective claims in relation to "known" standard varieties which are also usually subjective claims.
"Slightly hotter than a Jalapeno" means very little when a Jalapeno is anywhere from 3,000 scoville to 60,000 scoville.
I've learned in the course of making this site, that pretty much all information about peppers is garbage. That's half the reason I wanted to start this.
How expensive is testing now? It looks like the standard method is HPLC analysis of capsaicinoids. I found old forum posts from about 10 years ago indicating $50-$65 per test from providers including SBL, which doesn't sound bad, but I don't know if prices have gone up recently.
Part of the issue is that there's a massive variety between peppers, and genetic diversity is incredibly wide, making it nearly impossible to determine the exact type of pepper you have. There are a few different universities and governments that "certify" peppers, but they aren't connected in any way.
That makes a lot of sense. I was thinking about testing a particular pepper you have for chemical content, but genetic testing and mapping results to pepper type names does sound more complicated/expensive.