Just how do I progress on that Achievement? I keep buying and selling. but it doesn't move.

if you get extra point when you sell, then that doesn't count.

if you sell the Marijuana without receiving extra point after you sell the achievement will increase.

damn. I seem to get extra points every time

It says "Full Load Sold At A Profit 5x" Does that mean I hafto buy and sell 5lbs only? if I buy and sell 15 at a time it doesn't count?

no, it is a full load of drugs, the maximum you can carry.

thanx

yeah, it will not count cause the price is still same and the price must be at the higher price. And buy the recommended count of drugs if it says Full load sold it means the if you carry 5lbs you will buy 5lbs of it and sell it with a greater price.

Yer Yer. I got it. Seems my problem was that each time I sold a full load. my was awarded another lbs space. and then the game didn't consider my sale a full load. thinking it was lacking 1.

This should be corrected to count before giving a new lbs space. not after.