@Override
	public String getPrice(String seller, String service) {
		String price = null;
		ResultSet rs;

		try {
			PreparedStatement statement = connection
					.prepareStatement("SELECT * FROM ServicesSellers WHERE username = ?" +
							" AND service = ?");

			statement.setString(1, seller);
			statement.setString(2, service);

			rs = statement.executeQuery();

			if (rs.next()) {
				price = rs.getString("cost");
			}

			rs.close();
		} catch (SQLException e) {
			e.printStackTrace();
		}

		return price;
	}