someone please read and help me

i really need to know how much a 1969 convertible mustang in mint condition would go for

Well, if you have to ask.................(you can't aford it).
It depends on originality and equipment.
A basic 6 cyl (mint) about $20k.
A big block 4 spd car, $50k++
I can easily see rare, original, documented convertibles going for over $100 K at auction.