Okay. There was a recent discovery that FC had lowered ring sales to shops by a decent percentage which upset many ring makers out there (myself included). However, there was a discussion about whether or not selling an item to different shops made any difference at all. It was said to have made a difference in the past, but after a few patches, was eliminated. We were wrong. Sorta.
Different shops really do effect how many credits you'll receive for all your hard work. But it's not like you'll get more credits selling to an Armor shop than you would from a Map shop. For my trader, I've found that it works like this. With a ring, there is a "normal" price when sold to all the general shops (armor, map, weapons, implants, etc.) I put normal in quotation marks merely because it's the middle value. However, if you sold your ring to any trade shop (Electrical and Mechical Components, etc.), you've just been conned, my friend. You actually receive less credits selling to a trade shop than you would if you just walked a few feet and sold it to the armor shop.
It doesn't end there, there is a plus side. The "normal" value is less than the past value for rings that were sold to stores, as most of you have discovered. But it seems apparent that FC truly wishes us Traders to stick to Trade skills. Simply because you can sell your ring for more credits at any trader specific shop than you can from a general shop. Reasonably more, especially if you have a backpack full.
Oh! Almost forgot. I did check ring values for every NPC in Omni-Trade and they all buy the ring at "normal" value. There wasn't a credit difference between any of them. So NPCs do not give you a better value.
Now, for my evidence:
QL 41 Platinum Filigree Ring w/Perfectly Cut Silver Perl.
Trader specific shop value - 12,570 credits
"Normal" value - 10,775 credits
Trade shop value - 7,183 credits
QL 37 Gold Filigree Ring w/Perfectly Cut Crystal Sphere
Trader specific shop value - 7,829 credits
"Normal" value - 6,710 credits
Trade shop value - 4,473 credits
As you can obviously see, if you've been selling them to the electrical and mechical components shop right after you've made them like I have. Well, we've been seriously had. But now that you know there truly is a difference, we will never make that mistake ever again.
~Tatsu