diff --git a/bda/admin.py b/bda/admin.py
index 37fdf9c7..c706c0dd 100644
--- a/bda/admin.py
+++ b/bda/admin.py
@@ -218,7 +218,7 @@ class SpectacleReventeAdmin(admin.ModelAdmin):
 
     list_display = ("spectacle", "seller", "date", "soldTo")
     raw_id_fields = ("attribution",)
-    readonly_fields = ("shotgun", "expiration_time")
+    readonly_fields = ("expiration_time",)
     search_fields = ("spectacle__title",
                      "seller__user__username",
                      "seller__user__firstname",
diff --git a/bda/models.py b/bda/models.py
index 3642ee83..a9fd702f 100644
--- a/bda/models.py
+++ b/bda/models.py
@@ -228,7 +228,6 @@ class SpectacleRevente(models.Model):
     answered_mail = models.ManyToManyField(Participant,
                                            related_name="wanted",
                                            blank=True)
-      
     seller = models.ForeignKey(Participant,
                                related_name="original_shows",
                                verbose_name="Vendeur")
@@ -239,6 +238,8 @@ class SpectacleRevente(models.Model):
                                      default=False)
     tirage_done = models.BooleanField("Tirage effectué",
                                       default=False)
+    shotgun = models.BooleanField("Disponible immédiatement",
+                                  default=False)
 
     @property
     def expiration_time(self):
@@ -255,16 +256,6 @@ class SpectacleRevente(models.Model):
                    .astimezone(timezone.get_current_timezone()) \
                    .strftime('%D à %H:%M')
 
-    @property
-    def shotgun(self):
-        # Soit on a dépassé le délai du tirage, soit il reste peu de
-        # temps avant le spectacle
-        # On se laisse 5min de marge pour cron
-        return (timezone.now() > self.expiration_time + timedelta(minutes=5) or
-                (self.attribution.spectacle.date <= timezone.now() +
-                timedelta(days=1))) and (timezone.now() >= self.date +
-                                         timedelta(minutes=15))
-
     def __str__(self):
         return "%s -- %s" % (self.seller,
                              self.attribution.spectacle.title)
@@ -318,6 +309,7 @@ class SpectacleRevente(models.Model):
         connection = mail.get_connection()
         connection.send_messages(mails_to_send)
         self.notif_sent = True
+        self.shotgun = True
         self.save()
 
     def tirage(self):
@@ -350,4 +342,5 @@ Le BdA""" % (spectacle.title, winner.user.get_full_name(), winner.user.email)
                            mail_seller, "bda@ens.fr", [seller.user.email],
                            fail_silently=False)
         self.tirage_done = True
+        self.shotgun = True
         self.save()
diff --git a/bda/views.py b/bda/views.py
index b87b90d4..5cbe5b13 100644
--- a/bda/views.py
+++ b/bda/views.py
@@ -367,6 +367,7 @@ def revente_interested(request, revente_id):
     participant, created = Participant.objects.get_or_create(
         user=request.user, tirage=revente.attribution.spectacle.tirage)
     if timezone.now() < revente.date + timedelta(hours=1) or revente.shotgun:
+        # TODO améliorer le message d'erreur
         return render(request, "bda-wrongtime.html", {})
 
     revente.answered_mail.add(participant)
@@ -388,13 +389,9 @@ def list_revente(request, tirage_id):
     for spectacle in spectacles:
         revente_objects = SpectacleRevente.objects.filter(
                 attribution__spectacle=spectacle,
-                soldTo__isnull=True)
-        revente_count = 0
-        for revente in revente_objects:
-            if revente.shotgun:
-                revente_count += 1
-        if revente_count:
-            spectacle.revente_count = revente_count
+                soldTo__isnull=True,
+                shotgun=True)
+        if revente_objects.exists():
             shotgun.append(spectacle)
 
     if request.method == 'POST':
@@ -440,16 +437,13 @@ def buy_revente(request, spectacle_id):
         revente.delete()
         return HttpResponseRedirect(reverse("bda-liste-revente",
                                             args=[tirage.id]))
-    reventes_shotgun = []
-    for revente in reventes.all():
-        if revente.shotgun:
-            reventes_shotgun.append(revente)
+    reventes_shotgun = reventes.filter(shotgun=True)
 
-    if not reventes_shotgun:
+    if not reventes_shotgun.exists():
         return render(request, "bda-no-revente.html", {})
 
     if request.POST:
-        revente = random.choice(reventes_shotgun)
+        revente = random.choice(reventes_shotgun.all())
         revente.soldTo = participant
         revente.save()
         mail = """Bonjour !