You don't have to agree with what I'm saying, my opinion is just that, an opinion, not a fact, nor a philosophy, something you can wipe your ass with. With that said, I believe that the flea market itself can improve the game, if you make it in-raid that is. What I mean by that is a special hub, in a map, preferably when the open world tarkov launches, that is protected by a ragman, and his scav army. You walk in, you check out the merchandise other players are selling, you pay whatever it is the player is charging or haggle for better prices, and if you want to sell you pay ragman a fee, very similar to how the flea market is now, except for one thing. You won't be able to buy exactly what it is you are looking for, you can find bits and bolts, maybe a person is selling more expensive goods like ammo and weapons, but it will be much less available to every person in the game.
Additionally, I think a feature like this can be added to all the maps, all ruled by specific scav gangs, and their respected leaders for protection and insurance, varying prices, etc. I think this will open up new opportunities to making the game much more immersive. In all honesty though, I don't see this becoming a thing, developers are human beings and this all sounds like a big pain in the ass to make, compared to making new guns and assets that can be moved forward to future projects, such as "Russia 2028", And I'd rather have them focus their attention and energy to finishing up the game and optimizing it along the way to at the very least get a functioning product.