Pretty much anything. Weapons, armor and such. It's not really for any specific thing that I'd like to know but a variety. I've tried checkinh other stores and I see jacked prices pretty much everywhere. But even when I see stuff for cheap, I check it now and again and they're still there so it's a little confusing.

How about a motif? Those seem to be the most random priced items I've seen. Some as low as 3K to as high as 30K for the same one. Or even any gear of Blue rarity or higher might be better since that's pretty much all I sell since anything green or white is likely to be weaker than what someone currently has.

And thanks for the advice too.

people do buy the green and white items on occasion for the traits to learn for crafting. I know when I have a slot open and do not have an item with the trait that I need I try the guild bank and then guild stores and only grind for it if I have to. Nirnhoned is the only trait that has a high price tag and that is because there is only one way to get Nirnhoned gear other than player trading....and the Nirncrux used to be VERY hard to find. They changed that now, but they are still rare.
As for motifs, it would depend on which one. Primal, barbaric, deadric, ancient elf are all around 20K. Imperial- 80K. One page of Ancient Orc can go for around 50K. One page of Mercenary goes for a bout 10K. It all depends on the motif, its rarity, and of course your customer

Grab the add on Master Merchant and it will help you with that immensely.

The biggest factor on Guild store pricing is you have the Noob seller and the Vet Seller and prices can vary on same items also you get the Under cutter and the Price gouger. Both of what effect pricing as well.

I found just selling a item at near what Master Merchant was suggesting netted decent results

With the new players from free play weekend and the anticipation of Christmas Noobs, prices have been skyrocketing. Something I was selling for 300 is now going for 1,500 on Xbox NA.

from what I have been seeing on the forums, prices on consoles seem to be varying wildly with high prices being common. (I am on PC NA) The use of add0ns like Mater Merchant on PC help to keep merchants more honest IMHO. It is harder to get crazy high prices when you can compare prices as easy as you can with MM. I am in 4 of the biggest trade guilds on NA PC, and if you try to list something real high in one of these guilds I can tell you, it will not sell.

I see you mention motif prices above. On PC, basic blue racial motifs sell for about 100 or they don't sell, the 4 exotic racial (daedric, ancient elf, barbaric, primal) sell for like 7-12k, at the present time.(They used to sell for much more Daedric used to sell for 35k+) Imp sells for about 40-42k (used to reliably sell for 70K+), Dwemer pages sell for 3-4k, glass pages 25-35k each, ancient orc 30-50k each. These prices tend to trend downward as more crafters learn the styles and they come available on the crown store.

Most vet traders know how to use addons to price there wares to sell them quickly (I do 35-50 sales a day from my 120 sale slots) that involves taking into the overall game economy as well as the prices in the store that you are selling in. There is also a fair amount of psychology that goes into selling in guild traders. The best selling items on PC (I have guildies that track this info) are always crafting matts. With the best selling items being gold tempers whicj are currentlt trending toward higher prices. (tempering alloys are selling for 8.5k ea , deugh wax 3k ea, kuta 8.5k ea on PC) Players only buy non-set gear for decon or trait research. Set gear is where you probably see the most variance in pricing. Some items are just too rare to get a reliable price from MM. (Can you rely on a price if there are 2 sales in 65 days?)

With the free play weekend and Christmas noobs, starter zone are HOT HOT HOT!

We really need some form of Master Merchant on console.