Hey, I just wanted to offer some advice here. (Don't get upset or anything lol).
Your puzzle, most buyers would consider "clean" since they would want to try for better stats. So that adds up to about 5k EC.
5k+2.5k= 7.5k
Most sellers with a Double Dex DS are looking for about 10k-14k (depending on if it is elemental/physical, 18-22 dex, and personal preference) (this is also based on when I last checked the market, it has been a little while so there is a chance it has changed, sorry if this is the case).
Basically I'm saying, I'm not sure you are going to have much luck with this. If you do, then by golly you are one lucky person.
I suggest you try to get a clean DS for an exchange, and then work on BH, God Giving Quests, or Nation Wars to get Supply Tokens, and then try your luck on your own DS. (I suggest you get a Physical DS, because you can sell those easier). You may get lucky and get like double Magic/Strength/Dex, and then you can sell that for about the same price as the DS you are wanting.
You might even get lucky and sell it for more than the DS you want to buy, and make some extra money.
I hope this helps out some, I just felt I should say something. Good luck bud. ^^
