I made a comparison for you guys:
Chikara Oni-Roku = Azure
EWE EP21 Imp = Cobalt
Photonic Mayhem P4 = Heliotrope
i1870 SGA = Viridian
I just altered the stats to 79 attack and used the costs based on dmg/pec figures stated by MA
here. I included the 1% focus blow crit buff which you get from using these new pistols.
I added the "most common" amp type for each gun - a102 for Azure, a105 for Cobalt, a106 & a204 for Heliotrope, and a204 & a204 oc for Viridian.
There are no other buffs (e.g. Imp Ares) applied to the stats...
So, they're a range of very eco and mid-dps guns. Best grinding guns in the game for fast mobs (est + m87 style setups still better for slow mobs).
I would say along with the rarity (2 of each), prices would be around:
Azure - 7k (boosted due to uber eco with a102)
Cobalt - 10k
Heliotrope - 25-30k
Viridian - Sky is the limit. Maybe, 80-90k? I would value this gun more than an equal tiered ModMerc.
Also to note, tier costs will be
high if MA do not factor crit bonus into eco/tier cost calculations. If they do, tier costs will be
extreme.