Junior408

So i only had my vette for a year and half its a 2007 base model A6 still paying for it got it with 40k miles second owner currently have 60k on it i want a something newr and a 6 speed this time was thinking like a grand sport i like the wider body how would i be able to up garde i bought my vette at a used dealers ship not a main one i currently still owe about 20k