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.