There are tons of legit underground labs pushing out good products, and with the cost of a pill press, a lot use capsules. This being said there are also a bunch of jackasses out there selling garbage to inexperienced people they can take advantage of. I have a few rules for buying underground product
RULE #1 :NEVER BY UG JUICE FROM SOMEONE SMALLER THAN YOU. I mean shit, either they or someone they know are making it so they should have loads of it, and therefore be huge.
RULE #2 TALK TO OTHER PEOPLE USING THEIR PRODUCT. if no one is using it, it's probably fake, crappy, or over priced.
RULE #3 DON'T MAKE A HUGE FIRST ORDER (duh) (gotta try that jazz out)