I bought a 51 plate 2001 Octavia Estate (1.9 tdi) in April 2005 from my chauffeur pal with 188000 miles on the clock, I did not really want it as it was not as convenient as my Alhambra for my move to France but it was so cheap and left me £1500 better off when the Alhambra sold it only had to last me a year for the gamble to have paid off. In fact I got it the night before I moved so had to empty the Alhambra and squeeze it all in the Octavia.
13 years later and at 325000 miles it was still as sweet as a nut, it was only not being able to resolve the problem of all but the drivers door being deadlocked that made me buy an even better value MK2.
In hindsight had I invested in VCDS while I owned it then it would not have been scrapped, however it was 17 years old before having any electronic shenanigans, I did not even realise that it had canbus comms, the MK2 needed me to by VCDS within a week, up my skillset and make up for 13 years of not keeping my hand in.
I replaced the DMF and one cambelt (none had been done before even though my pal had paid for a couple of replacements) in all that time plus a coolant temp sensor, alternator brushes, fuel sender etc, brake pads and eventually discs because of a hairline ctack on one at 300000 miles, original exhaust & would have still been on the original battery if I hadn't left the lights on & killed it. I also gave the turbo the good news with Lidl oven cleaner once or twice.
It never ever broke down or used any oil. Never in my life had I kept a car more than a couple of years, the MK1 Octavia changed all that, you dont give up on a good thing.
My only complaint was that it was so reliable it left me to play 15 years of catch up on vehicle electronics & emission controls when I did change it for a 2006 vehicle.
The jump to a 2015 was pretty painless because the 2006 Octavia kept me on my toes most of the time.