most headache with used cars are:

1.Gear
2.Wirings & electronics

Gears can actually be repaired but shops tell you too difficult to repair just get recon (recon also not good condition maybe last few years), then take your faulty gear repair then sell to next customer as recon gear. banyak untung.

Engine on the other hand is more expensive but most shops can repair at cheaper price than replacing a gear.

Wiring & Electronics, are the most tricky part to troubleshoot.

If Old manual car, easier to repair.