老的在售列表接口即将废弃，qps 将会调低，请尽快迁移到新的在售列表接口（内测中），新接口提供 5/s 的 qps

NormalBuyParamV2DTO

{
    "productId": 0,
    "buyPrice": 0,
    "maxPrice": 0,
    "outTradeNo": "string",
    "tradeUrl": "string",
    "marketingList": [
        {
            "type": "COUPON",
            "discount": 0,
            "discountId": 0
        }
    ],
    "buyTypeEnum": "NORMAL_BUY",
    "steamId": 0,
    "tradeToken": "string"
}