Again, miles are not a savings account. Unless you are booking within the next few weeks, let the offer pass.
If the price you are paying to buy the miles is higher than this number, you are losing money. Better Alternatives If you're short on miles, consider these methods instead: buying miles worth it
Often the fastest way to get 50,000+ miles for "free" (after meeting a spending requirement). Again, miles are not a savings account
Buying miles at their "sticker price" (without a bonus) is almost always a losing game. You will likely pay 2–3 cents per mile for something worth only 1–1.5 cents. How to Calculate the Value buying miles worth it