I had never seen Black carburettors before...
There's a lot of work on it.
Did it have a frontal shock? The turning signals are not the good color, maybe new headlights.
The bumper has strange rivets (screws), and the hood seems to bo in a different tint than the chassis.
Was it a big shock on the left side?
Has the chassis been touched?
There's a lot of oil running, maybe it's only the first joint.
The board, good luck to find a new one, you can try to fix it.
How many kilometers does it have?
Did you try and dive it?
What is your project with it?
Race and circuit, or drive on the roads?
500€ is not really expensive but this one seems damaged,
and if you want to make it clean,
you might have quite a lot of work and it costs money.
I don't know how much the repairs cost in BG, but sometimes buying a car gives bad surprises.
Is it expensive 500€ for an old car in BG?
Are there a lot of AX sport in BG?
Do you have other models in sight?
You can still negotiate the price of the car.