If your server has items in shop, and when you click value and it only shows a number then coins, or any item for that matter then I have a simple fix for you 
Difficulty: -100/10
Searching only in Client.Java
Sorce's: Any Server To My Knowlage
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You should see something like this
Code:
sendMessage(GetItemName(removeID)+": shop will buy for "+ShopValue+" coins"+ShopAdd);
This means that upon checking item price it will tell u the shop value, and item coins in mill or k form, now to fix the selling...
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1 more time and it should say
Code:
sendMessage(GetItemName(removeID)+": currently costs "+ShopValue+" coins.);
that is just telling u the vaule, now to add the "mill" or "k" to money
Simply add
to the end of your code..
Should look exactly like this
Code:
sendMessage(GetItemName(removeID)+": currently costs "+ShopValue+" coins."+ShopAdd);
Ez Az PiE,
thanks for reading
Rep please if it worked for you, Post if you like it, Post if u have error