The cash difference between valuations, sorry for not getting back sooner.
Your car value:
5sp Manual U Multi-point injected 4cyl 1.5 1468cc
Average Private Price+ $4,400 - $6,500
Trade In Price Guide+ $3,300 - $4,600
Mine:
4sp Automatic U Multi-point injected 8cyl 5.7 5665cc
Average Private Price+ $24,100 - $27,900
Trade In Price Guide+ $21,500 - $24,800
So you would be looking at a 20k difference.