diff --git a/src/app/scoring.coffee b/src/app/scoring.coffee
index 6a3de2725e..5f050b9e68 100644
--- a/src/app/scoring.coffee
+++ b/src/app/scoring.coffee
@@ -162,7 +162,7 @@ score = (taskId, direction, times, batch, cron) ->
       # Don't adjust values for rewards
       calculateDelta(false)
       # purchase item
-      money -= taskObj.value
+      money -= Math.abs(taskObj.value)
       num = parseFloat(taskObj.value).toFixed(2)
       # if too expensive, reduce health & zero money
       if money < 0
diff --git a/views/app/index.html b/views/app/index.html
index 66c9b504de..f8ad96d041 100644
--- a/views/app/index.html
+++ b/views/app/index.html
@@ -451,7 +451,7 @@
         <div class=control-group>
           <label>Price
             <div class="input-append">
-              <input class="span5" size="16" type="number" value={:task.value}><span class="add-on">Gold</span>
+              <input class="span5" size="16" type="number" min="0" value={:task.value}><span class="add-on">Gold</span>
             </div>
           </label>
         </div>