I was once 3500 GB pounds (about $7500 CDN) behind on a Land Rover Discovery, and paid it happily to get out of the lease. Worst vehicle I ever had. Paid off the hit by selecting a vehicle that didn't have the same personal tax liability as a company car, back when the UK tax rules changed to penalize vehicles that polluted more. I came out ahead after 12 months in a VW Passat diesel.

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2007 X3 3.0si, 6 MT, Premium, White

Retired:
2008 535i, 6 MT, M Sport, Premium, Space Grey
2003 X5 3.0 Steptronic, Premium, Titanium Silver
2002 325xi 5 MT, Steel Grey
2004 Z4 3.0 Premium, Sport, SMG, Maldives Blue