My opinion:
Trans Coupon 4-8m(varies too much trust me
)
Halloween Set (3) 60-90m(all halo price went down a good amount recently)
Halloween Set (5) 100-130m
Halloween Set (6) 220-300m(never saw for 220m but u putted it so ill stay with the minimum price.)
Jack Head (perm) 280-350m(i think it in the near future will begin to worth a lil more again,not that much i think tbh just putting a lil more
)
Meto Jack 450-525m(i dont think it is that much
)
Attack Bot v3 350-500m (if i remember right lately there was still some v3s sold for 350-400m
not sure though)
P ef 40-65m(worths more than R)
R ef 30-50m(worth less than P and not much ppl have interest in it actually causing u to sell a lil cheap)
Bladess +7 set 150-250m(the price of this went incredibly up lately)
Bladium +7 set 75-100m(some ppl sell cheaper and lately never saw for more than 100m tbh)
Membership (3 month) 150-200m(i agree with ninja)
Jura Trans (1 year) 280-400m(if unused it go for more)
Jura Trans (permanent) untradeable but ppl pay around 800m-1b for 7k zc
Halloween Trans 150-200m (good stats and it price went up recently)
Dark Meto Gun 200-300m(some ppl sell 2k for 200m)
Candy ef (+4) 7-20m(not that good,same stats as bcv2 II(that isnt that rare) and a lot of candys spawned in xmas)
100K Coins (Normal Coins) 4-8m(same as tc)
Elektra Set (+7) 60-100m(very hard to sell actually so ppl sell cheap)
Metorium Set 800m-1.2b (same reason as jura,but in that case meto set is a lil more than 7k,using some of ur extra 600 coins for buying 7k)
Dark Surge (E) Set 600-800m(not saying this cuz im selling it,but cuz 2 sets were recently sold cheap cuz a person bought for 475m and resold for 550m(not sure about that 550m,but was between 500-600m) In january mod nik was paying 900m+ for it according to what he said to me.Now he got the set already
Just my opinion
And yes it took some mins to do this