is this extra unique jewel?

Today I put an offer on my item for 10 chaos and suddenly started receiving dozens of messages.
Meanwhile, someone warned me by stating that I had a very cheap price. Then when I checked the price of the item, I saw that there was only one and no price on the server, and only one standard and 50 ex price, because of these two together "minions deal %10 increased damage and renewal.". By the way, I can't say I'm very good at this game. At least I can get an estimated price from you. Because I'm really confused.

Renewal: Minions regenerate 1% of Life per second. Minions have 10% chance to deal Double Damage while thay are full life.

They don't give a crap about the stats on the jewel, they'll scour and vendor it first chance they get.

But an 8 passive minion damage large cluster? That's a useful base item. Or will be once you vendor and scour it.