The value of the front hubs would probably depend on whether they're original (which is preferable over cheap aftermarket), and of course if they rotate absolutely smoothly. You might find out in The Mall
what a set of front '88 hubs will go for.
The brake calipers are also relatively rare, but you'll probably be using the rears if you intend on using the cradle.
I had an opportunity to strip a base '88 several years. It was pretty well naked by the time I finished with it. (I have an '88 Formula, so I wanted spare everythings.