Stuff
You've managed to make no point at all in that post?
The nephew got a 4 year old RS125 for LESS than a thousand pounds (not £3k for a new 125 so thats............. like a 3rd, and if he drops it, and if he bins it, its a grand...........not 3k)
As for it being an RS, and not an RG or NSR, you find an RS for the same price as a decent DTR, or NSR, you buy it.
I only do 3 miles a day across town, too little for a car, I'm not push biking or walking, a 125 is a valid option for me to commute on.
However, I decided against it as even the X reg ZR750 I bought instead is cheaper to maintain, its economical, cheap to fix if I get knocked off..... and all for the price of a second hand 125.
See?
Simples.