You'll probably get more replies if you post the tags in English.
I don't read French (that's French, right?) but I'm guessing based on what I can see.
1) 15-20kish I think. Istani Shields are a rare skin that you don't see traded often. I've seen a gold q9 sell for 200k on the auction site and I've traded a few gold q9's for 60-150k in the past. The purple and the q10 will hurt it, price wise, but the skin is the same in purple. (Nice how you dyed it purple, too - I like that touch!

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2) q9 gold inscribable writhing focus: 10-15k+ for those. I can't tell what inscription that is, but if it's a 20% Forget me Not (HSR restoration) then the inscription alone is 30-45k.
3) bone charm - can't see the picture.
4) q9 spined focus - it's a rare skin. I've sold them w/out price mods for 20-40k in the past
5) q10 accursed icon - depends on the skin. If it's the Medusa head skin, it'll be easier to sell than the diamond mini-shield skin. Not more than 10k either way imo.
6) q11 pyrewood staff - um, again, not sure of the mods on it, so they may be worth more alone or at least raise the price a little (though unlikely) For the staff alone, maybe 10-15kish? Hard to say - those come and go popularity-wise and the skin is available from weapon smiths.
7) q9 pyrewood staff - the imperfection in the inherent hsr (19% vs 20%) will significantly effect the price of this. I can't tell what mods you have, but I'd say merch/salvage to no more than 5k.
8) q12 canthan fire staff - it can still be hard to find this skin variant, even with them dropping in NF. Even with the q12, I'd say at least 20k, maybe more.
9) q9 cold damage (? is that cold damage?) portal - those will still fetch 25k-35k I think. Takes a while to find a buyer.
10) q9 domination magic dead staff (is that right?) - 10-15k+ Max damage dead staffs used to be extremely rare and expensive. They're easier to find from the undead in the Desolation now, though, and prices have dropped off a lot. The skin still has some fans around, though.
Well, there's my best guesses. :S Hope it helps! GL!
EDIT - just saw your reply below. for 10, if it's an inscribed staff (same or very similar skin as a dead staff) then maybe 5-10k. I think it would be harder to sell than a similar dead staff.
Oh, and I think you can change the language in options (F11) Look around the tabs, it's in there somewhere.