princely sum of

مبلغ ناچیز
مبلغ با شکوه ( به صورت طنز - منظور همون کم و ناچیزه و حالت مسخره کردن داره )
a princely amount of money is very large – often used humorously to mean a very small amount of money
My savings had now reached the princely sum of �30.