Just as the title says really. Got a 16 plate qashqai that I got with 9k miles for just under £10k nearly 2 years ago, 23k miles now. 1 previous owner. Need something bigger now so wondering about part exchange and how it works in reality, and any tips..? I'm worried about knowing if I'm getting a good deal, negotiating and talking to sales people and things like that.. do I just try any random car dealership or is it best to find the car I want first on say auto trader then enquire?