Hey John,
Interesting...after a while they are probably worth that much for the parts alone...
After all, a plane selling for $5,000 that needs $20,000 to become airworthy is really a $25,000 airplane in the end.
MM
Chortle! Oh dear! Let's not extrapolate, but I cannot resist
A $15000 plane that needs $3-$5000 a year to STAY airworthy comes to mind. Is it, after, say, ten years, a $45,000-$65,000 plane? Hmm. Here's how to figure what kind of plane you have:
X = p + yn
Where
X is the dollar adjective, as in "a
$25,000 plane;"
P is the Purchase Price;
Y is the number of years you have kept/are keeping it, and
n is the outgo per year to keep it airworthy.
This stunt is done by professionals; Do not try this at home!