Hi,
I have a value question about a 77 Porsche targa. I know there are many variables involved in assessing a value of an older car. I just need a rough idea.

Info about the car in question:

1977 Porsche targa.

It was in a car accident in its earlier life, and was modified with 78+ SC rear panels during the repair. The car looks like a 78+SC targa.
You can tell that it was repainted, when standing close.

The engine was modified also, the displacement was increased from 2.7 to 2.8.

Interior is what you would expect for 30+ year old car. The power windows on passenger side go up very slow if at all. The leather has a few rips in the rear seats. Also the door handle is broken. Overall not perfect, but fixable.

I have been trying to find a value of the car. I have seen a 78SC go from 7,700 to about 12,000 in similar condition.

Any help would be appreciated. Thanks in advance.

-Ivan