sbstatus.cs

 public static async Task<InventoryStatusResponse> GetInventoryStatus(string id)
        {

            var numRetries = 0;
            var siteId = "228202-91B";
            do
            {
                try
                {
                    using (var client = new HttpClient())
                    {
                        var inventoryStatusRequest = new InventoryStatusRequest
                        {
                            SiteId = siteId,
                            BasketItems = new List<BasketItem>
                            {
                                new BasketItem
                                {
                                    ProductNumber = id
                                }
                            }
                        };


                        var content = new StringContent(JsonConvert.SerializeObject(inventoryStatusRequest), Encoding.UTF8, "application/json");

                        var response = await client.PostAsync("https://www.systembolaget.se/api/basket/create", content).ConfigureAwait(false);

                        if (response.StatusCode == HttpStatusCode.InternalServerError)
                        {
                            siteId = "2202"; //try ordinary store as well
                        }

                        response.EnsureSuccessStatusCode();

                        var responseText = await response.Content.ReadAsStringAsync().ConfigureAwait(false);

                        return JsonConvert.DeserializeObject<InventoryStatusResponse>(responseText, new JsonSerializerSettings { NullValueHandling = NullValueHandling.Ignore });
                    }
                }
                catch (HttpRequestException)
                {
                    numRetries++;

                    if (numRetries > 3)
                    {
                        throw;
                    }


                    await Task.Delay(TimeSpan.FromSeconds(10));

                    Console.Out.WriteLine("Retrying " + id);
                }
            } while (true);
        }