Very hard to value a car without seeing it in person, regardless of how good the internet pics are. I've been very surprised, both positive and negative, in person compared to images.
Mid teens, yes, is right there for a really good, not perfect car. I'd put my GTV, now with a [hopefully] happy new owner, in that category. Best cars could top $20K, and more typical cars with mild rust, cosmetic tattiness, or mechanical issues would be closer to $10K. This is for 1750s and 2000s. Stepnoses will be higher.