The vendor dropshop (you can find out more about them in our wiki, "Verkäufer aus Österreich") offers dead drops for some of the things you're looking for.
I can't vouch for this vendor though, we haven't had anyone post a proper review about them yet and I haven't tried them personally either.
I saw them on lot of market but i cant find any proper review for them on any market. Where should i try them? Which market have the best escrow system?
As a mod of this sub, I prefer not to express support for specific markets and would rather just refer to /d/superlist. The current landscape of markets is pretty chaotic since the archetyp seizure and abacus (most likely) exit scam and I also haven't fully figured out what the most trustworthy markets are at the moment. I can only really tell you that DropShop is active on the markets listed in the wiki, which one of those is the most trustworthy is something you'll have to decide yourself.
I can't vouch for this vendor though, we haven't had anyone post a proper review about them yet and I haven't tried them personally either.
Thanks