Sometimes getting a good price requires trying new items and finding new places to sell them at. Lately I've been selling a fair number of ship hulls (among other things). I buy them on Jita and ship them off to carefully chosen stations to sell at (stations besides the 5 main hubs that is).
Here's an example.
Some buyers even bought more than one at a time!
I shipped another 20 manticores out to the same station today and priced them a little higher since there were no others listed.
Manticores normally go for around 20 million in sell orders on Jita so that's around 33% profit. I've bought stacks of 10 or 20 at jita market sell prices, shipped them off via courier contract and resold them for as much as 40 million (100% profit). Some were only shipped 1 jump away though most were 10-20 jumps.
Manticores, Drakes, Crows, Tengus are just a few of the ships I've been selling.
Ships are slowly but surely becoming a bigger part of my business. Away from the main hubs I find the competition on ships isn't as bad as on most things. When prices are too close to Jita prices I'll often post over market, wait a day or three until the competition sells out and then mine sell at a much better price. I figure the competition isn't as bad because shipping hulls takes a lot of cargo space, many players don't have a ship big enough to move hulls in or can't move very many at once and aren't willing to pay for / wait for courier service.
Don't just sell the same stuff everyone else is selling, a lot of things sell well everywhere. Try some of your best sellers in other places, especially high volume items, they'll probably sell just about anywhere. I've had a lot of success getting excellent prices for things nobody else was selling in the area. In some cases nobody (according to market history anyhow) had ever sold one in the entire region!
Knowing who's in the area and what they do can help you figure out what they're likely to buy and what they might pay a nice premium for but don't be afraid to take a chance on something unusual. Sometimes you'll be amazed at what sells and just how much you can get for it.