Fantastic used cars are very rare. I'm fortunate enough to be capable of building a car let alone repairing or maintaining one...
I've had 5 used cars. None have been great. No matter what the make or model, Lambda sensors and the like go bust, crankshaft oil seals leak, batteries go bust, belts need changing and so on.
Bought my current 2005 Corsa 3 years ago for £2000 with 45000 miles on it, full service history, 1 owner blah blah. In the last 3 years I have had to replace Lambda sensor, crankshaft position sensor, MAF, rack ends, drop links, battery, wiper motor, wiper linkage, crankshaft oil seal, and then all the usual service stuff like, oil, plugs, blades,belt, coolant, filters. I expect to do the timing chain next year. For the cost of all this I could of just bought a new car and not of had to get under the car so much.
So if you can get a brand new car, avoiding potential history issues of a used car, avoiding high likelyhood of extra maintenance costs, with warranty, for a good price like that, and see a car as an a to b machine, go for it!
A colleague at work has one of these Sanderos. Had it 2 years no problems. Is happy with it.
Best cars I have worked on have been Toyotas btw. Worst is this Corsa with Fiat engine. Known loads of people with 8, 9,10, 11 year old BMWs left broke because of out of the blue, huge repair costs.
Have a fleet of around 10 Merc vans at work. All have had probs.