If you are looking at a 2000 model, check to make sure it has the updated, "pinned" heads. It literally has a pin next to the spark plug to help distribute the fuel from the injector. If it does NOT have pinned heads, I would buy it for the cost of the boat alone.
This sounds harsh, but I have run a lot of Ficht motors. A good one can be great, but a bad one will be a nightmare. Chet, at DFI will be your best friend. I am currently running a 2001 Ficht 150 HP without issues. I just took it out for a spring shakedown today, after several months of sitting and she ran great, as usual. I plan to take her to the bay for some striper fishing next week.
Here is me running some gas through her a while back, after sitting for months:
Here is when I first put her on the Offshore and was testing it out:
I have a 2nd complete parts motor, as parts have become CRAZY expensive. If I didn't have that motor, I might not fix if something went wrong, I would just slap on one of the other motors I have around. Probably not something most people can or want to do.