An extra million dollar on the piece get spent by many organizations and people involved and increases the production of the resources they want and decreases the allocation of resources to produce things other people want.
Unless they store most of it in a bank somewhere and don’t use it, it has effects on the real economy.
Yes, it has effects on the real economy (although in the case of these high-value positional goods I'd argue they're rather smaller than you might think - as likely both buyer and sellers are simply swapping for money which otherwise will sit in a bank account so the effects are limited to those imparted by the middle-men).
Unless they store most of it in a bank somewhere and don’t use it, it has effects on the real economy.