4 keys sounds very fair, even more since 85% is 4.29 Keys actually.
Also I edited your title to make it correct according to our rules.

would also avoid the gut, and battle scared knives (well, yeah, i got one but don't be like me !)

So it's minimal wear, actually the float isn't nice (0.11) but anyway, float isn't really increasing/decreasing prices on blue steel, mostly depends on the in game look.
his regular price is ~286.60 USD (http://csgo.steamanalyst.com/id/1836) but in keys you should be able to get at least 85% of that wich means you could get at least 97 Keys.

at this range, I know that vanilla knives are quite easy to trade, but fact is that since they're easy to trade, prices aren't that much negotiable for them. max bet knives are also nice to trade, like, buy them at 28 & sell them at 29 or something like that, ugly knives but easy to sell to betters, just be sure to buy a true maxbet.

you can actually make profit from small stuff, but know that the profit you're making is proportional to the initial money you put in the game. It's like a percentage. if you can get 5% profit per trade, with 100€ you can get 5€ but with 1€ you'll get 0.05€. So actually you'll need a lot of patience, and actually since you'll profit from like 3 K worth of stuff, you'll try to aim like 0.10€ profit per trade and the problem that might occur is that the prices are not 100% stable so you might even lose your profit just because of the price stability.

Would say 30 K according to another one I saw

The corner is really bad actually, might worth a little bit more but for sure it'll not be that easy to resell.

they might be a little bit hard to trade since not a lot of people are attracted by blue laminate, posting on reddit post including "katowice 2014" remains the best thing to do imo. anyway just be patient, I don't think that your prices are bad, the amount of buyers is simply not too high :)

You should be able to et 1/2 K for each laminate with only 1 sticker Kato 2014. For redlines, you could get 2 K overpay so yeah,4 K in total. For the two blue laminates with IBP and titan, the max you could get for each in my opinion is something like 7 Keys, since the stcker isn't holo and the skin itself a little bit cheap. Made a little mistake about the LGB redline, since I though the sticker was a little bit higher in price, anyway, since it looks really nice onit, I believe people could pay 4 K for it.

I might not be an expert, but I would say that you could get at least 1/2 K per AK, and at least 5 K for the ones with IBP or Titan, but I know that blue laminate aren't that much loved so can't be that much overpriced. Also for others with stickers that are not from kato 2014, I doubt you could get more than a key for them. the redline with the two LGB 2015 might be worth ~4 keys aswell.