I have seen 2800usd for a 136th s19xp
a 210 th unit burning the same 3100 watts means 74th for the same power.
or $4.50 a day extra so in 1000 days it earns 4500 usd more than a 136th s19xp
2800+4500 = 7300 usd my guess is :
7500 usd to 9500 usd for 1 unit
preorder and at least a 2 month wait.
I would tackle it from a different perspective. With a daily production of 210T, you can earn approximately 0.00046200 at the current difficulty level. As a result, the break-even price would be $13,680. However, the S19XP's break-even price is higher at $21,080. If Bitcoin were to drop back into the $20,000 range, your profitability would be compromised, but the S21 would remain a profitable option.