diff --git a/src/core/marketplace.cpp b/src/core/marketplace.cpp
index 8f39498..bf77cec 100644
--- a/src/core/marketplace.cpp
+++ b/src/core/marketplace.cpp
@@ -45,10 +45,8 @@ void Marketplace::sortSellers() { std::sort(sellers_.begin(), sellers_.end()); }
 
 Seller* Marketplace::findSellerWithSellerNo(int sellerNo)
 {
-    auto iter =
-        std::find_if(sellers_.begin(), sellers_.end(), [sellerNo](const auto& a) {
-            return a->getSellerNo() == sellerNo;
-        });
+    auto iter = std::find_if(sellers_.begin(), sellers_.end(),
+                             [sellerNo](const auto& a) { return a->getSellerNo() == sellerNo; });
     if (iter == sellers_.end())
         return nullptr;
     return (*iter).get();
@@ -57,4 +55,21 @@ Seller* Marketplace::findSellerWithSellerNo(int sellerNo)
 void Marketplace::addArticleToBasket(std::unique_ptr<Article> article)
 {
     basket_.push_back(std::move(article));
+}
+
+size_t Marketplace::basketSize() { return basket_.size(); }
+
+void Marketplace::finishCurrentSale()
+{
+    if (basket_.size() == 0)
+        return;
+
+    auto sale = std::make_unique<Sale>();
+
+    for (auto iter = basket_.begin(); iter != basket_.end(); ++iter) {
+        sale->addArticle((*iter).get());
+        (*iter)->getSeller()->addArticle(std::move(*iter));
+    }
+    
+    sales_.push_back(std::move(sale));
 }
\ No newline at end of file
diff --git a/src/core/marketplace.h b/src/core/marketplace.h
index 790b404..9887e4f 100644
--- a/src/core/marketplace.h
+++ b/src/core/marketplace.h
@@ -21,6 +21,7 @@ class Marketplace
 {
   public:
     Marketplace();
+
     void storeToDb(bool onlyDelete = false);
     void loadFromDb();
     SellersVec& getSellers();
@@ -29,6 +30,8 @@ class Marketplace
     void sortSellers();
     Seller* findSellerWithSellerNo(int sellerNo);
     void addArticleToBasket(std::unique_ptr<Article> article);
+    size_t basketSize();
+    void finishCurrentSale();
 
   private:
     SellersVec sellers_;
diff --git a/src/gui/CMakeLists.txt b/src/gui/CMakeLists.txt
index 90899c4..ce0bab3 100644
--- a/src/gui/CMakeLists.txt
+++ b/src/gui/CMakeLists.txt
@@ -11,9 +11,12 @@ find_package(Qt5Widgets CONFIG REQUIRED)
 set(GUI_SOURCES
     kima2.cpp
     mainwindow.cpp
+    mainwindow.ui
     sellerdialog.cpp
+    sellerdialog.ui
     sellermodel.cpp
     pricedialog.cpp
+    pricedialog.ui
 )
 
 add_executable(kima2 ${GUI_SOURCES})
diff --git a/src/gui/mainwindow.cpp b/src/gui/mainwindow.cpp
index d25c088..77c063e 100644
--- a/src/gui/mainwindow.cpp
+++ b/src/gui/mainwindow.cpp
@@ -1,7 +1,7 @@
 #include "mainwindow.h"
 
-#include "sellerdialog.h"
 #include "pricedialog.h"
+#include "sellerdialog.h"
 
 #include <regex>
 
@@ -45,28 +45,30 @@ void MainWindow::on_sellerNoEdit_checkSellerNo()
     auto inputText = ui_.sellerNoEdit->text().toStdString();
 
     if (inputText.empty()) {
-
+        if (marketplace_->basketSize() > 0) {
+            marketplace_->finishCurrentSale();
+        }
         return;
     }
 
     regex pattern{R"(\d{1,5})"};
     smatch result;
+    
     if (!regex_match(inputText, result, pattern)) {
         return;
     }
+
     int sellerNo = std::stoi(result[0]);
 
     auto seller = marketplace_->findSellerWithSellerNo(sellerNo);
     if (seller) {
-        std::cout << "!!! Seller gefunden: " << seller->getFirstName() << "\n";
         PriceDialog priceDialog(this);
         auto dialogResult = priceDialog.exec();
-        if (dialogResult == QDialog::Accepted)
-        {
+        if (dialogResult == QDialog::Accepted) {
             int price = priceDialog.getPrice();
             auto article = std::make_unique<Article>(price);
             article->setSeller(seller);
-            std::cout << "!!! Neuer Artikel: " << article->getPrice() << "Cent \n";
+            std::cout << "!!! Neuer Artikel: " << article->getPrice() << " Cent \n";
             marketplace_->addArticleToBasket(std::move(article));
         }
     }
diff --git a/src/gui/mainwindow.ui b/src/gui/mainwindow.ui
index 44fe7db..2e26e5f 100644
--- a/src/gui/mainwindow.ui
+++ b/src/gui/mainwindow.ui
@@ -52,7 +52,54 @@
         <item>
          <layout class="QHBoxLayout" name="horizontalLayout_4">
           <item>
-           <widget class="QLineEdit" name="sellerNoEdit"/>
+           <widget class="QLineEdit" name="sellerNoEdit">
+            <property name="palette">
+             <palette>
+              <active>
+               <colorrole role="Base">
+                <brush brushstyle="SolidPattern">
+                 <color alpha="255">
+                  <red>197</red>
+                  <green>255</green>
+                  <blue>169</blue>
+                 </color>
+                </brush>
+               </colorrole>
+              </active>
+              <inactive>
+               <colorrole role="Base">
+                <brush brushstyle="SolidPattern">
+                 <color alpha="255">
+                  <red>197</red>
+                  <green>255</green>
+                  <blue>169</blue>
+                 </color>
+                </brush>
+               </colorrole>
+              </inactive>
+              <disabled>
+               <colorrole role="Base">
+                <brush brushstyle="SolidPattern">
+                 <color alpha="255">
+                  <red>239</red>
+                  <green>239</green>
+                  <blue>239</blue>
+                 </color>
+                </brush>
+               </colorrole>
+              </disabled>
+             </palette>
+            </property>
+            <property name="font">
+             <font>
+              <weight>75</weight>
+              <bold>true</bold>
+             </font>
+            </property>
+            <property name="placeholderText">
+             <string>Eingabe Verk.-Nr.</string>
+            </property>
+           </widget>
           </item>
           <item>
            <widget class="QPushButton" name="paidButton">