This was some thing we done for awhile in deep thought and it worked out well. Oftentimes one ends up with a excess of a certain plant or other spiritual compound he could use this section to sell off his excess instead of having it go bad. You can also sell samples to fellow brothers on the path who may be interested in trying a plant but dont want to buy it in bulk before they have had a chance to try it.
For example I have plant X and I report that it is a great tool in the use of changa. Person B wants to try it but doesnt want to drop 30 dollars on a bulk supply of it just to try so he works out a deal with said person to get a small quantity to test it out. Person A has plenty and does not mind giving up a little bit to help a brother out in this endeavour. He offers it up at cost or if he feels generous free.
Furthermore other things such as home made items like pipes and ceremonial bowls etc can be sold to assist some of those who arent as financially well off and help them financially support their personal research.
Let me give a example. Piracetam I can get this for 30.00 for a fairly large supply. If one were interested in it he would have to purchase it for the amount I stated just to try it. For somone who just wanted to see what it was like dropping 30 bucks plus shipping is a little bit much. If I were to offer up say a weeks supply for 5.00 they could try it before they invested in it to determine if it is something they want to pursue.
The process allows many people to broaden their experiementation in many aspects without dropping 20-50 dollars per ingredient which if you all have done this you know adds up really really fast. You could even sell used glassware and other items.
If you don't sin, Jesus died for nothing.