diff --git a/src/ship/shops/mod.rs b/src/ship/shops/mod.rs
index e8753d1..bfff30d 100644
--- a/src/ship/shops/mod.rs
+++ b/src/ship/shops/mod.rs
@@ -1,3 +1,7 @@
 pub mod weapon;
 pub mod tool;
 pub mod armor;
+
+pub trait ShopItem {
+    fn price(&self) -> usize;
+}
diff --git a/src/ship/shops/weapon.rs b/src/ship/shops/weapon.rs
index f2aead2..f108e12 100644
--- a/src/ship/shops/weapon.rs
+++ b/src/ship/shops/weapon.rs
@@ -9,6 +9,8 @@ use rand::seq::{SliceRandom, IteratorRandom};
 use crate::entity::character::SectionID;
 use crate::ship::room::Difficulty;
 use crate::entity::item::weapon::{WeaponType, WeaponSpecial, Attribute, WeaponAttribute};
+use crate::ship::shops::ShopItem;
+use crate::ship::item_stats::WEAPON_STATS;
 
 
 const TIER1_SPECIAL: [WeaponSpecial; 8] = [WeaponSpecial::Draw, WeaponSpecial::Heart, WeaponSpecial::Ice, WeaponSpecial::Bind,
@@ -26,6 +28,80 @@ pub struct ShopWeapon {
 }
 
 
+fn special_stars(special: &WeaponSpecial) -> usize {
+    match special {
+        WeaponSpecial::Draw => 1,
+        WeaponSpecial::Drain => 2,
+        WeaponSpecial::Fill => 3,
+        WeaponSpecial::Gush => 4,
+        WeaponSpecial::Heart => 1,
+        WeaponSpecial::Mind => 2,
+        WeaponSpecial::Soul => 3,
+        WeaponSpecial::Geist => 4,
+        WeaponSpecial::Masters => 2,
+        WeaponSpecial::Lords => 3,
+        WeaponSpecial::Kings => 4,
+        WeaponSpecial::Charge => 2,
+        WeaponSpecial::Spirit => 3,
+        WeaponSpecial::Berserk => 4,
+        WeaponSpecial::Ice => 1,
+        WeaponSpecial::Frost => 2,
+        WeaponSpecial::Freeze => 3,
+        WeaponSpecial::Blizzard => 4,
+        WeaponSpecial::Bind => 1,
+        WeaponSpecial::Hold => 2,
+        WeaponSpecial::Seize => 3,
+        WeaponSpecial::Arrest => 4,
+        WeaponSpecial::Heat => 1,
+        WeaponSpecial::Fire => 2,
+        WeaponSpecial::Flame => 3,
+        WeaponSpecial::Burning => 4,
+        WeaponSpecial::Shock => 1,
+        WeaponSpecial::Thunder => 2,
+        WeaponSpecial::Storm => 3,
+        WeaponSpecial::Tempest => 4,
+        WeaponSpecial::Dim => 1,
+        WeaponSpecial::Shadow => 2,
+        WeaponSpecial::Dark => 3,
+        WeaponSpecial::Hell => 4,
+        WeaponSpecial::Panic => 1,
+        WeaponSpecial::Riot => 2,
+        WeaponSpecial::Havoc => 3,
+        WeaponSpecial::Chaos => 4,
+        WeaponSpecial::Devils => 3,
+        WeaponSpecial::Demons => 4,
+    }
+
+}
+
+impl ShopItem for ShopWeapon {
+    fn price(&self) -> usize {
+        WEAPON_STATS.get(&self.weapon)
+            .map(|weapon_stat| {
+                let mut price = weapon_stat.atp_max as f32;
+                price += self.grind as f32;
+                price = (price * (price * 3.0)) / weapon_stat.shop_multiplier;
+
+                let percent = self.attributes.iter()
+                    .fold(0.0, |acc, attr| {
+                        acc + attr.map(|a| a.value).unwrap_or(0) as f32
+                    });
+
+                price = price + ((price / 300.0) * percent);
+
+                let special = self.special.map(|special| {
+                    special_stars(&special) as f32
+                }).unwrap_or(0.0);
+
+                price += special * special * 1000.0;
+
+                price as usize
+            })
+            .unwrap_or(0xFFFF)
+    }
+}
+
+
 #[derive(Debug, Deserialize)]
 struct WeaponTableTierEntry {
     weapon: WeaponType,