Looks as though it has been used rather than laying around, which in my opinion is a good thing. I take it that it is the twin rear wheel axle,
A reasonable chassis. strongly built body and real wood interior.
If it suits then for say £8k go for it, providing it does drive ok etc.
Haven't done a translation of the details, but my reading of the spec suggests only 300kg payload (on paper). I would recommend getting it weighed before purchasing - you may find that there's nothing left to play with. If it has got twin rear wheels (looks like it to me also), then it's likely to be able to have a MGW of greater than 3500kg - so may have been downplated.