I just started playing Skyrim and I am loaded up with stuff to sell. I went into Lucan's Valerius store to sell. I press e to talk to him. He lists items he has to sell but the list starts 1/2 way down the page. I understand my items that I have to sell should come after his, but his items go all the way to the bottum with no room for mine and I didn't see a scroll option available. How can I sell my items?

There is a Buy List and a Sell List.

Click one of the Icons above the list to switch. If your on the PC, I believe the key is Alt, not sure on the consoles. SkyUI makes this a bit different and I have had that mod so long I forget the stock UI.