I think you mean black market items.
The black market on Howrse is where you can purchase special items to enhance your game. You can access it via breeding >> black market.
he gives you black market items
The black market items go with the horse and disappear.
You can only sell black market items to other players.
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No. There is no possible way to remove a BM item on a howrse. You can get rid of the wings from Medusa's Blood by using a Golden Apple, but that is probably the only thing that changes...
There are several different ways to getting black market items on howrse. The most common way is to buy the items with passes, which can be bought (with real money), earned (through different ways, for example: every 5 karma points), being given a pass/black market item from another player, and/or winning passes. You can also obtain black market items by trading one or two black market items from your inventory for another item with another player who accepts your offer. Sometimes, Howrse staff are kind enough to give away free black market items to players whom complete certain objectives. (Like the September Calender 2011) - Ecclipze on Howrse
It may under or over the minimum or maximum howrse age limit required for most items.
On Howrse Helper (google it) there is a list of people that can give black market items.
All Black Market items are sold using passes where as if you were to got to the store you would be using Equus. Also Black Market items are breeders items however items from the store are more everyday use. I hope this helps.
From 30 days registered you can trade items. With a Pegasus account you can begin right away.
black market > click on item > choose "use one from my stock"