That Fairy Crawford's nice - they are well known, well made stoves.
The top plates look they are still sitting nice and flat, so it likely hasn't been pushed hard.
And I see that it has a wood plate sitting on top of dock ash coal grates, that look nice and straight. Plus the firebox liner looks in good shape. More indications that it wasn't used hard.
If there's no cracks in any of the castings that looks like it's ready to go for coal, or wood.
The 8-20 means it has 8 inch diameter round covers in the cook top and a 20x20 inch oven.
And it has the trap door in the oven floor to make it easier to clean the oven flues - which can be done while the range is still running , in direct mode.
Only thing is, I don't see the right end extension shelf.
A decent price too. That'll make someone a very nice coal/wood range.