A Honda @125 is a premium scooter, definitely a class above the Bolwell VS125 or TGB, to compare the @125 you need to compare with the likes of the Daelim NS125 or Yamaha Cygnus 125.
If you can get a immaculate low mileage @125 for the same sort of money that new Bolwell VS125 costs, then personally I go for the @125.
The Aprilia SR50 on eBay is fairly old, although I guess 7,600km is not too bad for it's age, given the overall condition and that the exhaust had already been repaired by welding suggesting that possibly a new exhaust might be needed soon, I would not be wanting to pay more than say $1,000 assuming the motor is ok.