A mate of mine has just got one for his first bike in his early 40s. Nice bike, feels well screwed together. Hilariously the Indian built KTMs(125 and 390) are more reliable than the ‘proper’ ones.
I’d say a good condition duke will hold its value almost as well as a Japanese options, but they’re a lot more stylish.
I really liked it, I had a quick go, the controls were shockingly light, but could have just been because I’ve gotten used to a 21 year old 1000cc Vstrom. Gearbox is really slick, a great first bike.
Would echo what others have said, they’re very theft attractive, apparently the 390 engine slots straight in so popular with scrotes. Also make sure he leaves the standard pipe on because pipes on 125’s sound shit.