I have a 2000 225 Ficht. It has been a good motor so far as it is now 15 years old and the only repairs (knock on wood) other than routine maintenance work to it has been to replace the P/T motor ($200) and starter ($100). Very efficient on fuel too, but I baby mine and it has rarely ever been opened up. I have never caught a fish going 70 MPH.
That being said, there has not been a motor made that has a worse reputation than the Ficht has. They have practically zero resale value and you will have a hard time finding a dealer that would even consider taking one in on trade for a new motor. You definitely want to stay away from the 1998-1999 models as those are the guinea pig years of the technology and the ones that had the most issues. If the price is good on the boat that you are looking at then by all means go for it. But, consider about $1500 for the price that the motor adds to the value of that boat.
Also consider that a loaded new Evinrude G2 will run you about $27K now :o . Mercury is the cheapest motor you can repower with today.