Underground brokers sell guns for $150-350, a mark-up of perhaps 200% over the legal price.They also demand a fee of $30-50 for orchestrating the deal.

• 黑市经纪人销售枪支的价格为150-350美元，其售价大概高出合法枪支的200%25，并且还要收取30-50美元的交易策划费。