孟加拉马尔达芒果出口下降，导致国内价格上涨，卖家获得更优惠的价格。 Bengal Malda mango exports decline, causing higher domestic prices and better rates for sellers.

由于不明因素，孟加拉马尔达芒果出口量下降，导致国内市场卖家价格上涨。 Bengal Malda mango exports have declined due to unspecified factors, leading to better prices for sellers in the domestic market. 出口下降可能导致国内芒果需求增加，价格上涨，从而使卖家受益，因为他们的产品在国内可以以更优惠的价格出售。 The lower exports may have caused an increase in demand and higher prices for the mangoes within the country, benefiting sellers with better rates for their produce domestically. 但出口下降的具体原因并未被提及。 The exact reasons for the decline in exports are not mentioned.