1 ton of fertilizer (this stuff 16-8-24) is about 500-700bucks per ton
1 ton = 2200 pounds
divide that up in 25 pound bags that 88 bags 
lets say I want to sell my 25 pound bags dirt cheap lets say 15 bucks
15 X 88 = 1320 - (500-700) bucks from that 620-820 profit 
and that's with me selling 25pound bags. the profit on 5 pound bags is ridiculous! my main variable was the price at (15 bucks per 25 pound bag)!! so in reality if his bags cost more his profit on this is really high. and you have all been buying this for how long? 
if i'm spending this much on fertilizer I better get some pixie dust included
when he tells you the price on his bags do this 
(  PRICE x 88= ? - (500-700) = his profit )   
sorry if I made all of you rage on thanksgiving lol goble goble goble.
and saying that he has (several tons) just shows that he bought in BULK so he got even more of a discount. and if he's gonna say he had to buy the materials (500-700$ per ton) at a much higher price. don't be fooled....if he's been a scientist for 30 years and worked in universities like he claims to be then he can get this dirt cheap!  
 
   
  