Kieron Williamson, from Trunch, Norfolk, has a dozen works up for sale, which are expected to fetch around £100,000 each.
That follows the £242,095 sale last Friday of 23 pictures snapped up in 20 minutes by email and phone bidders.
The cheapest was a small £2,450 watercolour while a snow scene near his home raked in £30,000.
His dad Keith, 46, said: "He is not motivated by the money side of things. He just wants to do paintings that people will like."
Kieron - dubbed the Mini Monet - began painting landscapes at five. His first sale of 19 pictures in 2009 raised £14,000.
Adrian Hill, of the art gallery in Holt, Norfolk, where the lad has his latest exhibition, said: "Kieron's paintings continue to be overwhelming and quite incredible.
"The recognition from art critics and fine artists is absolutely remarkable. People just cannot believe that he is producing work like he does and he is still only ten."
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