I recently opened up my shop on SMP1. It's located in my residence (address 2166). It's currently being built but i'm sure you can profit of the cheap Oak Logs at 16/12$. The next item I will be adding is the cobblestone so i'm asking you what's a fair price to sell stacks of 16 cobblestones.
I like your prices! I'd put the Cobblestone at about 5-10R to get people to buy it. Just make sure you have enough cobble to keep your shop restocked. P.S. This should be in the Community Marketplace forum.