Sell Diamonds

[wboson]

So I have 2 big diamonds worth of 12k.
And some1 in Fleamarket was talking about Adonis buying in Flea market and he mentioned at least 2 other buyers who would give 600$ instead of 400$. I stared at the Flea Market for 5min and couldn´t see any Diamond sellers\buyers, only those useless stands selling Molotov and what else.
Is there any point of searching more or do I just sell them?(atm I´m good financially so no rush with selling).

[Akadai]

The preacher in the church, forget the grid. Not the actual fleamarket, but the grid to the left. He'll buy small diamonds for $600. I just cash in the big diamonds, not sure anyone takes those ones. The preacher in my game is... no longer available, I'll just say >_>

The guy in the fleamarket town, in the gated house... place, whatever, next to the market. He has a green npc icon over his head. You can trade in diamonds for "loot boxes" which have random rewards. Sometimes it's worth it, sometimes it's not. It's been more worth it with my experience so far. You can also get the item needed for Larry out of them

Rewards can vary, another diamond, gun mod parts, skill magazines, a dead cat... you know, normal things

[stretch]

There are the 12k diamond cases which I have never seen any use for other than cash and there are little diamonds which are used elsewhere in limited amounts. There are 5k big diamonds which I do not recall any use for.
Flea market - one guy takes little diamonds in return for loot boxes but there is a limit. He is in the house in the corner and it is a conversation thing not a direct purchase off the table.
The preacher in the church to the West also buys and sells them. You get faction for each purchase and sale.
I do not recall any other use for them but as there is undoubtably something I have overlooked I would say stash 10 little diamonds and one of each of the cases and big diamonds somewhere and sell any others. I ended one game with so many in my stash and 5M in cash even without selling them.

You can open up the menu where you start the extend merc contracts process and sell all valuables there but I DO NOT recommend using it as it can and will sell ALL valuables and there is at least one quest item that is both and will be sold. The museum statues and valuables I guess probably go too and they have a use in game so for safety sake I would never use that button.

[wboson]

Ok thanks for the answers. I did a mission and this guy told me a long story about all the fellas in diamond business but seems like it was just a story then;)

Yep little diamonds are useful for trading all kinds of things.