10% is absurd. Don’t waste your time.
Purchases* under 100,000 isk, add 300k to 350k.
Purchases between 100k and 300k, add 350k to 500k
Purchases between 300k and 700k, add 500k to x1.85
Purchases over 700k, x1.85
High isk items need some adjustment, like a 36m is ship, I might put at 1.3x <-edit
When someone undercuts you, undercut them, so they realize this market is unprofitable for them money and time-wise.
Create your market in a good location, make it yours.
Ask some frequent buyers what they would like to see you carry.
When I say ‘Purchases’, I mean Market Sales Price at the nearest large trading hub. Hopefully you have bought most of your stock at much reduced prices thru buy orders.
You don’t want to sit on buy orders forever. Increase the price offered aggressively, so you have a occator filled within two or three days. Some items you will have to pay market price just to fill the ship and get the hell out of there.
I’ve learned what to sell by endlessly playing with ship fittings…
This is how you become a tycoon like my alt.