EDIT#5: Some people fail to see that this is NOT a way to get free items.
Code:
1C 00 F2 03 [B1 11 2E 0A] [DWORD player id] [DWORD location(Y,X)] 06 00 00 00 [DWORD location(Y,X)] A7 00 00 00
The exploit is for fun only and I have yet to see anything usefull to do whit it(other then annoying other people by taking 2 spot ). It will make your "shop carpet" spawn anywere in your screen(it need to be a valid location thoug) in the market(never tested outside but the server do look your coords before opening your shop).
First you have to find a location where the server will allow you to "open" a market. Second step is to send your "crafted" packet whit the desired location you want your "carpet" to spawn(you can also make it spawn on someone else spot ).
NOTE: If you use this to annoy other player you could get BANNED ASAP if they report you(I think...). Also, I wouldnt really call this an "exploit".
The attached file is a "map" of the market whit the locations(X,Y) and other information(exemple, etc..).
EDIT: Sorry for the title and description but I had to type it like that.
EDIT#2: I found another post about this >< . An old one htoug.
EDIT#3: I think most people already knew this.
EDIT#4: I tested if you could put your carpet ANYWERE in the market and...you can.