diff --git a/src/mtgcoll/client/components/inventory.cljs b/src/mtgcoll/client/components/inventory.cljs
index 68d8ca7..759cabe 100644
--- a/src/mtgcoll/client/components/inventory.cljs
+++ b/src/mtgcoll/client/components/inventory.cljs
@@ -6,6 +6,7 @@
     [webtools.reagent.bootstrap :as bs]
     [webtools.cljs.ajax :as ajax]
     [webtools.cljs.utils :refer [->url]]
+    [mtgcoll.client.auth :as auth]
     [mtgcoll.client.page :refer [set-error!]]))
 
 (def qualities
@@ -23,59 +24,75 @@
              :params {:card-id card-id :quality quality :foil foil?}
              :on-error #(set-error! "Server error while adding card to inventory.")))
 
+(defn can-modify-inventory?
+  []
+  (or (not (auth/auth-required?))
+      (auth/authenticated?)))
+
 (defvc inventory-management
   [card-id]
-  (let [inventory (view-cursor :owned-card card-id)
-        inventory (group-by :quality @inventory)]
+  (let [inventory      (view-cursor :owned-card card-id)
+        inventory      (group-by :quality @inventory)
+        colspan        (if (can-modify-inventory?) 2 1)
+        quantity-class (if (can-modify-inventory?)
+                         "quantity col-sm-1"
+                         "quantity col-sm-4")]
     [bs/Grid {:fluid true :class "inventory-container"}
      [bs/Table
       {:condensed true :hover true :bordered true}
       [:thead
        [:tr
         [:th ""]
-        [:th {:col-span 2} [:span.text-center "Normal"]]
-        [:th {:col-span 2} [:span.text-center "Foil"]]]]
+        [:th.text-center {:col-span colspan} "Normal"]
+        [:th.text-center {:col-span colspan} "Foil"]]]
       [:tbody
-       (map-indexed
-         (fn [idx quality]
-           (let [inventory         (get inventory quality)
-                 quantities        (group-by :foil inventory)
-                 foil-quantity     (or (:quantity (first (get quantities true))) 0)
-                 non-foil-quantity (or (:quantity (first (get quantities false))) 0)]
-             ^{:key idx}
-             [:tr
-              {:class (if (or (> foil-quantity 0)
-                              (> non-foil-quantity 0))
-                        "bg-warning")}
-              [:td.quality-label.col-sm-4
-               [:span.text-right
-                [bs/FormControl.Static
-                 (str (string/capitalize quality) ": ")]]]
-              ;; non-foil
-              [:td.quantity.col-sm-1
-               [bs/FormControl.Static
-                [:strong non-foil-quantity]]]
-              [:td.col-sm-3
-               [bs/ButtonGroup {:justified true}
-                [bs/ButtonGroup
-                 [bs/Button {:bsStyle "success" :on-click #(on-add-card card-id quality false)}
-                  [bs/Glyphicon {:glyph "plus"}]]]
-                [bs/ButtonGroup
-                 [bs/Button {:bsStyle "danger" :disabled (= 0 non-foil-quantity) :on-click #(on-remove-card card-id quality false)}
-                  [bs/Glyphicon {:glyph "minus"}]]]]]
-              ;; foil
-              [:td.quantity.col-sm-1
-               [bs/FormControl.Static
-                [:strong foil-quantity]]]
-              [:td.col-sm-3
-               [bs/ButtonGroup {:justified true}
-                [bs/ButtonGroup
-                 [bs/Button {:bsStyle "success" :on-click #(on-add-card card-id quality true)}
-                  [bs/Glyphicon {:glyph "plus"}]]]
-                [bs/ButtonGroup
-                 [bs/Button {:bsStyle "danger" :disabled (= 0 foil-quantity) :on-click #(on-remove-card card-id quality true)}
-                  [bs/Glyphicon {:glyph "minus"}]]]]]]))
-         qualities)]]]))
+       (doall
+         (map-indexed
+           (fn [idx quality]
+             (let [inventory         (get inventory quality)
+                   quantities        (group-by :foil inventory)
+                   foil-quantity     (or (:quantity (first (get quantities true))) 0)
+                   non-foil-quantity (or (:quantity (first (get quantities false))) 0)]
+               ^{:key idx}
+               [:tr
+                {:class (if (or (> foil-quantity 0)
+                                (> non-foil-quantity 0))
+                          "bg-warning")}
+                [:td.quality-label.col-sm-4
+                 [:span.text-right
+                  [bs/FormControl.Static
+                   (str (string/capitalize quality) ": ")]]]
+                ;; non-foil
+                [:td {:class quantity-class}
+                 [bs/FormControl.Static
+                  (if (> non-foil-quantity 0)
+                    [:strong non-foil-quantity]
+                    [:span.text-muted 0])]]
+                (if (can-modify-inventory?)
+                  [:td.col-sm-3
+                   [bs/ButtonGroup {:justified true}
+                    [bs/ButtonGroup
+                     [bs/Button {:bsStyle "success" :on-click #(on-add-card card-id quality false)}
+                      [bs/Glyphicon {:glyph "plus"}]]]
+                    [bs/ButtonGroup
+                     [bs/Button {:bsStyle "danger" :disabled (= 0 non-foil-quantity) :on-click #(on-remove-card card-id quality false)}
+                      [bs/Glyphicon {:glyph "minus"}]]]]])
+                ;; foil
+                [:td {:class quantity-class}
+                 [bs/FormControl.Static
+                  (if (> foil-quantity 0)
+                    [:strong foil-quantity]
+                    [:span.text-muted 0])]]
+                (if (can-modify-inventory?)
+                  [:td.col-sm-3
+                   [bs/ButtonGroup {:justified true}
+                    [bs/ButtonGroup
+                     [bs/Button {:bsStyle "success" :on-click #(on-add-card card-id quality true)}
+                      [bs/Glyphicon {:glyph "plus"}]]]
+                    [bs/ButtonGroup
+                     [bs/Button {:bsStyle "danger" :disabled (= 0 foil-quantity) :on-click #(on-remove-card card-id quality true)}
+                      [bs/Glyphicon {:glyph "minus"}]]]]])]))
+           qualities))]]]))
 
 (defn inventory
   [card-id & [{:keys [num-owned owned? button-size button-style] :as opts}]]