I was talking to a corp-mate last night and she mentioned that she used to go to fringe mining systems away from trade hubs and put up buy orders for Trit at much cheaper than the current prices (ie. 1,000,000 trit @ 4.0 ISK ea/ whereas Jita is around 5.07). She said she made a hefty profit because miners either didn't know where to take their minerals or couldn't transport them.
My question is- Can I tell where these systems might be by looking at the starmap and it's associated statistics? Should I use an external website? I have a miner myself, but I normally followed my corp to mine, so I'm not really sure where these systems are I should look for.
Also, I do a lot of station trading but I'm having trouble grasping some meta-game aspects about which regions might be better to buy/sell in. While there are a lot of guides that talk about how to find good items (ie. Bullworth Burger), I don't see much talking about strategies for certain regions.
I have been focusing on railguns in Rens lately, as well as setting up some wide buy orders at a station in the middle of many mission areas. The problem is I don't know what type of items are dropped during higher level missions. What would a missioner sell quickly?