diff --git a/src/pricebot/core.clj b/src/pricebot/core.clj
index e3e6a34..b2ac355 100644
--- a/src/pricebot/core.clj
+++ b/src/pricebot/core.clj
@@ -179,13 +179,18 @@
   (println msg)
   (System/exit status))
 
+(defn pprint-to-string [o]
+  (with-out-str (clojure.pprint/pprint o)))
+
 (defn get-args [keys args]
   (let [input-opts (parse-opts args cli-opts)
         opts       (into {} (map (partial get-key input-opts) keys))
         missing    (filter (fn [k] (not (get opts k))) keys)]
-    (cond (:help opts)           (exit! 0 (println (:summary opts)))
-          (:errors opts)         (exit! 1 (println (str/join \newline (:errors opts))))
-          (not (empty? missing)) (exit! 2 (println (str "missing arguments: " (str/join " " (map name missing)))))
+    (cond (:help opts)           (exit! 0 (:summary opts))
+          (:errors opts)         (exit! 1 (str/join \newline (:errors opts)))
+          (not (empty? missing)) (exit! 2 (str "missing arguments: " (str/join " " (map name missing))
+                                               \newline
+                                               "available: " (pprint-to-string opts)))
           :else                  opts)))
 
 (defn -main [& args]