For 2000 euros, you have this marvellous lens, in perfect condition, with 2 lens caps and the original box.
Every serious LL member know that 2K€ for such a lens, in this condition, is a good price.
If you want more (some filters, a metal lens hood... or a case in crocodile skin), just accept to pay it... or do not use it.
Regards, F.