Repair economics
Is a £1,500 repair worth it on a £5,000 car?
The percentage gets attention. The cash needed to replace the car can matter more.
Start with the value, but do not stop there
A £1,500 repair is 30% of a £5,000 estimate. That is useful context, not an automatic sell signal.
Price the alternative
If an equivalent replacement costs £8,500 and the current car could exit at £4,500, changing needs about £4,000 extra cash.
Look backwards too
Recent repair spend can change the picture. £1,500 today after £2,000 of repairs last year is different from the same bill after three trouble-free years.
Get evidence when the answer is close
A specialist quote or real buyer offer can be worth more than another generic rule of thumb.