The monk, who leads the Chaeng Watthana protest site in Nonthaburi, on Friday brought the farmers to the GLO building in Nonthaburi's Sanambin Nam district.
Once there the protesters demanded the GLO purchase the rice from the farmers angered by the wait for long-overdue rice-pledging scheme payments.
After three hours of negotiations, the GLO agreed to buy 112 tonnes of rice at 12,000 baht per tonne, totalling 1.3 million baht.
The monk also said on Saturday he would report to the police on Sunday after receiving a summon earlier.
He said he did not know the charge yet but confirmed he was not afraid of being arrested even though he had an arrest warrant for obstructing elections.