diff --git a/Assignment-3/buyer-compare.ol b/Assignment-3/buyer-compare.ol
new file mode 100644
index 0000000..f8ceb69
--- /dev/null
+++ b/Assignment-3/buyer-compare.ol
@@ -0,0 +1,58 @@
+from SellerShipperServiceInterfaceModule import SellerInterface
+from BuyerServiceInterfaceModule import BuyerShipperInterface, BuyerSellerInterface
+
+include "console.iol"
+
+service BuyerService {
+	execution { single }
+	
+	outputPort Seller1 {
+		location: "socket://localhost:9005"
+		protocol: http { format = "json" }
+		interfaces: SellerInterface
+	}
+
+	outputPort Seller2 {
+		location: "socket://localhost:9007"
+		protocol: http { format = "json" }
+		interfaces: SellerInterface
+	}
+
+	inputPort ShipperBuyer {
+		location: "socket://localhost:9003"
+		protocol: http { format = "json" }
+		interfaces: BuyerShipperInterface
+	}
+
+	inputPort SellerBuyer {
+		location: "socket://localhost:9004"
+		protocol: http { format = "json" }
+		interfaces: BuyerSellerInterface
+	}
+
+	
+
+	main {
+		ask@Seller1("chips")
+		[quote(price1)]
+		ask@Seller2("chips")
+		[quote(price2)]
+		if (price1 < 20 && price1 < price2) {
+			println@Console( "price 1 lower than 20 and price 2")()
+			accept@Seller1("Ok to buy chips for " + price1)
+			reject@Seller2("Not ok to buy chips for " + price2)
+			[details(invoice)]
+			println@Console( "Received '"+invoice+"' from Shipper!")()
+		} else if (price2 < 20 && price2 < price1) {
+			println@Console( "price 2 lower than 20 and price 1")()
+			reject@Seller1("Not ok to buy chips for " + price1)
+			accept@Seller2("Ok to buy chips for " + price2)
+			[details(invoice)]
+			println@Console( "Received '"+invoice+"' from Shipper!")()
+		} else {
+			println@Console( "Both prices too high")()
+			reject@Seller1("Not ok to buy chips for " + price)
+			reject@Seller2("Not ok to buy chips for " + price)
+		}
+	}
+}
\ No newline at end of file
diff --git a/Assignment-3/buyer.ol b/Assignment-3/buyer.ol
index 961badb..b99ae1e 100644
--- a/Assignment-3/buyer.ol
+++ b/Assignment-3/buyer.ol
@@ -7,7 +7,7 @@ service BuyerService {
 	execution { single }
 	
 	outputPort Seller {
-		location: "socket://localhost:9005"
+		location: "socket://localhost:9007"
 		protocol: http { format = "json" }
 		interfaces: SellerInterface
 	}
diff --git a/Assignment-3/seller2.ol b/Assignment-3/seller2.ol
new file mode 100644
index 0000000..3912866
--- /dev/null
+++ b/Assignment-3/seller2.ol
@@ -0,0 +1,41 @@
+from BuyerServiceInterfaceModule import BuyerSellerInterface
+from SellerShipperServiceInterfaceModule import SellerInterface, ShipperInterface
+
+include "console.iol"
+
+service SellerService {
+    execution { concurrent }
+
+    outputPort Buyer {
+        Location: "socket://localhost:9004"
+        Protocol: http { format = "json" }
+        Interfaces: BuyerSellerInterface
+    }
+
+    outputPort Shipper {
+        Location: "socket://localhost:9006"
+        Protocol: http { format = "json" }
+        Interfaces: ShipperInterface
+    }
+
+    inputPort BuyerSeller {
+        location: "socket://localhost:9007"
+		protocol: http { format = "json" }
+		interfaces: SellerInterface
+    }
+
+    main {
+        [ask(product)] {
+            println@Console( "Price requested" )()
+            quote@Buyer(20)
+        }
+        [accept(order)] {
+            println@Console( "Accepted" )()
+            order@Shipper(order)
+        }
+        [reject(order)] {
+            println@Console( "Rejected" )()
+        }
+    }
+
+}