Go up and talk to someone in the market district. at the bottom ther is three little boxes. one of them will kind of look like the recycling logo with the two swirling arrows. click on it. from there you can buy and sell, but ONLY with people who own a shop. I barter with the jewler guy a lot. hope this was helpful.
Not 100% sure about general merchants but I know that all Thieves Guild members sell them. Just join the thieves guild.
not in most stores but if the owner isn't honest enough (and i have no idea hoe to tell if they are) then you can
Well to make the fences actually buy your stolen items/items you will need to join the thieves guild. Howether i know of 3. When You Join The Thieves guild you will be able to activate the fence in bruma. and then when you get further in the guild you will be able to activate the girl in bravil (normally at the lonely suitor lodge at around 9/10pm). then when you have nearly completed the guild you will be able to activate the one in the imperoal city - the dark elf (who has a massive 1500 to sell your stolen goods)! i cannot tell you the names as that would kinda be spoiling Eh. Lol ;D
First, Join the Thieves Guild, Second, Go to Skingrad, Third, Find a man named Glarther, Fourth, Do the quest he asks you to do, Fifth, tell him that all the people he asks are spying on him, Sixth, tell the guard that asks you, his true thoughts, Seventh, refuse to give those people, ummm..... a shorter life, Eighth, show the note he gives you to the guards, Ninth, Watch the guards kill him, Tenth, take his keys and his gold from his body, Eleventh, Ransack his house, Twelth, sell his stuff to the fence in the thieves guild, Thirteenth, enjoy his wealth. Directions on joining the thieves guild, steal something, then be thrown in jail, do this multiple times, until finally someone from the guild contacts you in prison, she will give you the directions.
merchant guild would buy merch and then sell while craft guilds would sell the stuff they made i think...
many traders will sell some lesser effect scrolls, the mages guild is free to join and will provide you with many spells and scrolls and when you enter an oblivion gate many deadra will drop useful scrolls
You have to become a high level character in order for them to appear, or you can make them yourself in the arcane university.
You can only sell stolen items in Skyrim, The Elder Scrolls V, to a fetch in the thieves guild or regular merchants after you have bought the perk that allows you to.
If you have completed the Theives' Guild missions, the fence: Fathis Ules buys items at a max of 1500 septims.
Steam has it.
Sell things.
No.