Depends on the kind of party, it might not take a lot of money. But it does take time and energy.

Seriously, it’s not that hard to find.

Is anyone into watches at the age when rich men try to pick them up? I could be easily impressed by a watch now (a personalised G-Shock $50-300, any diapason $500-2k, an enthusiastic watch geek explaining their Jaeger-Lecoultre…), but not part of the target demographic.

Any reason to celebrate in a way all participants/affected find enjoyable is a good reason. Not very intelligent aliens.