Is a used 1998 LeMond Buenos Aires worth $450?
It's a well speced bike, Reynolds tubing is top quality. Given the 1998 price tag of $1300, I would say the current price is good. It will be harder to ride than a modern bike, but not by too much.

Watch out for rust around the bottom bracket covers and cable stops. Early model carbon forks can wear also. It's 8 speed, so still easy to buy chains and cassettes for.