The seller's job is to sell the vehicle. Your job is to understand the vehicle, the numbers and the risk before you commit.
The repair bill is only part of the loss
A bad used-car purchase can create towing, rental-car costs, missed work, repeated diagnostics, insurance complications, and lost time in addition to the repair itself.
Bad financing magnifies the mistake
If you financed an overpriced vehicle with a long term and high APR, you can owe more than the vehicle is worth while also paying for repairs. That makes replacing the car much harder.
Resale can punish hidden history
Accident history, title brands, poor repairs, neglected maintenance, or an unpopular configuration can reduce resale value even when the vehicle is running today.
Spend on information before you spend on problems
Market research, history review, independent inspection, and a disciplined deal review can cost far less than one major mechanical or financing mistake. The point is not to eliminate every riskβit is to avoid buying risk blindly.
Bottom line
Do not let urgency replace verification. Compare the market, understand the history, inspect when appropriate, review the complete transaction and decide your maximum before emotion takes over.