Hello Tanidis Triantafillos
You cannot add more that 10,00,000 in SP Property -> Property Price. If you want to increase the digits, then you have to change in the database. Please run this SQL query on your database. By default, the value is FLOAT(8,2). If you make it FLOAT(9,2), then you can add 1 more digit in the price 1,00,00,000
ALTER TABLE `xxxxx_spproperty_properties` CHANGE `price` `price` FLOAT(9,2) NOT NULL DEFAULT ‘0.00’;
Use your table prefix instead of xxxxx on the table name.
Best regards