Wasslaam dear! As far EK 2006 concern there is no problem to use it in 2017 as I am personally using the same without any major problem yet (except the sound of fan belt while stop on signals and AC is on, but that is resolved by turn of the AC for that span of time). So, as a whole if this particular car has been used with care and respect since 2011, then it must be as smooth and as entertaining as mine. Which is EK 2006 registered in FEB2011. May I know that what he/she is demanding for it?
Test before buying:
1. Personality of the seller either he/she seems a reasonable person or someone born with PIA (pain in ass) belive in RAGRAA even their own ass ... LOL
2. It must be soundless while IDOL
3. Pickup
4. AC cooling (must consider that not as cool in sunlight as in evening due to a small AC)
5. Electrical wirings all original (jack to jack) or taped (Paki style). This will disclose it's originality.
6. Last but most important the feel you have while sit in that car from your own instinct
All the best rest!