diff --git a/src/gui/mainwindow.cpp b/src/gui/mainwindow.cpp
index 01727af..8b03e70 100644
--- a/src/gui/mainwindow.cpp
+++ b/src/gui/mainwindow.cpp
@@ -17,6 +17,7 @@ MainWindow::MainWindow()
             &MainWindow::on_actionEditSeller_triggered);
     connect(ui_.sellerNoEdit, &QLineEdit::returnPressed, this,
             &MainWindow::on_sellerNoEdit_checkSellerNo);
+    connect(ui_.paidButton, &QPushButton::clicked, this, &MainWindow::on_paidButton_triggered);
 
     marketplace_ = std::make_unique<Marketplace>();
     marketplace_->loadFromDb();
@@ -25,7 +26,6 @@ MainWindow::MainWindow()
     BasketModel* model = new BasketModel(getMarketplace(), ui_.basketView);
     ui_.basketView->setModel(model);
     ui_.basketView->setColumnHidden(0, true); // hide the uuid
-
 }
 
 void MainWindow::on_actionEditSeller_triggered()
@@ -44,6 +44,14 @@ void MainWindow::on_actionEditSeller_triggered()
     }
 }
 
+void MainWindow::on_paidButton_triggered()
+{
+    if (marketplace_->basketSize() > 0) {
+        dynamic_cast<BasketModel*>(ui_.basketView->model())->finishSale();
+    }
+    return;
+}
+
 void MainWindow::on_sellerNoEdit_checkSellerNo()
 {
     using std::regex, std::regex_match, std::smatch;
diff --git a/src/gui/mainwindow.h b/src/gui/mainwindow.h
index d6f5160..68f2afd 100644
--- a/src/gui/mainwindow.h
+++ b/src/gui/mainwindow.h
@@ -17,10 +17,12 @@ class MainWindow : public QMainWindow
     MainWindow();
     Marketplace* getMarketplace() { return marketplace_.get(); }
 
-  private:
+  private slots:
     void on_actionEditSeller_triggered();
     void on_sellerNoEdit_checkSellerNo();
+    void on_paidButton_triggered();
 
+  private:
     Ui::MainWindow ui_;
     std::unique_ptr<Marketplace> marketplace_;
 };
diff --git a/src/gui/pricedialog.cpp b/src/gui/pricedialog.cpp
index 9b657e8..bbf9957 100644
--- a/src/gui/pricedialog.cpp
+++ b/src/gui/pricedialog.cpp
@@ -16,7 +16,8 @@ void PriceDialog::accept()
 {
     if (static_cast<int>(std::round(ui_.priceSpinBox->value() * 100.0L)) % 50 != 0) {
         QMessageBox(QMessageBox::Icon::Warning, "Falsche Preiseingabe",
-                    "Es sind 0,50 Cent-Schritte erlaubt", QMessageBox::StandardButton::Ok, this)
+                    "Es sind nur 0,50 Cent-Schritte erlaubt.", QMessageBox::StandardButton::Ok,
+                    this)
             .exec();
     } else {
         QDialog::accept();