Sufficient that a couple of grand is neither here nor there. Some will buy on the never never, others crimp and save, many sacrifice saving and pensions for toys. A £2k GPU, if you're being sensible, is a month's disposable income, unless it makes you money. They depreciate quickly, have a relatively short life, as top dog, and can break.
The people I know, who have the biggest debts, also earn the most. Fine whilst your job is good, but there are a lot of apparently successful people sailing very close to the wind