to the tune of 

Used when making reference to a costly item, or a large debt.

Yo mah nizzle, I gots my ass into Fatty D to the tune of $20. Word

to the tune of by Jamie S November 1, 2003

to the tune of 

about, close to

You owe back taxes to the tune of $900,000.

to the tune of by Scott November 2, 2003