the price is going to go up, especially bitcoin halfing is coming next year...
The price of the rtx4090 today in China is double what it was yesterday. The average listed price of the 4090 in China at PC stores as of right now is around $3500, compared to $1800 yesterday
By the way China isn't the only country that selling a 4090 to is banned, these countries are banned as well:
Afghanistan, Armenia, Azerbaijan, Bahrain, Belarus, Burma, Cambodia, Central African Republic, China, Democratic Republic of Congo, Cuba, Cyprus, Egypt, Eritrea, Georgia, Haiti, Iran, Iraq, Jordan, Kazakhstan, North Korea, Kuwait, Kyrgyzstan, Laos, Lebanon, Libya, Macau, Moldova, Mongolia, Oman, Pakistan, Qatar, Russia, Saudi Arabia, Somalia, South Sudan, Republic of Sudan, Syria, Tajikistan, Turkmenistan, United Arab Emirates, Uzbekistan, Venezuela, Vietnam, Yemen, Zimbabwe