The 15k mile tuneup on a 360 modena is somwhere in the $8000 to $12000 dollar range. I'm not exactly sure of the number, so it might actually be more. I do know that one of the reasons it's so expensive is that this service includes replacing the timing chain and you have to drop the engine to do it!
I raced with a few people that owned various ferrari's, porsche's, BMW's. Once, I was having a pretty random day at the track (laguna seca) so one of them took me for a joy ride in his 360 to cheer me up. Earlier that year I did a really excellent job of not taking him out when I was running him down and had a brake failure, so maybe he was paying me back for that. All I can say is WOW! We took the back road from the track, down the hill to highway 68. Picture your quintessential twisty, smooth 2 lane northern Cali road and you'll understand. Absolutely amazing. Just a different world from anything I'd been in before or since. In hindsight, it probably wasn't the smartest thing I ever agreed to, as Dave's on track performances were accident prone to say the least. I'm still in one piece so I guess it was OK.
Dave was actually in line to buy a Vette Z06, as I guess he had an empty space in the garage next to his Viper (rich people suck!). He put in his order and waited patiently for it to arrive. Some time goes by, the dealer calls him up to tell him it was there, so he goes there the next day to pick up his car. When he got to the dealership, he found out they sold the car to someone else who offered them $5k more for it. Dave took his deposit and vowed never to set foot in that dealership again. This is a perfectly idiotic move on the part of the dealership as Dave has cubic dollars in the bank. If they had treated the guy with a little respect, he'd be buying new vette's from that place for years. He promptly bought the Ferrari and never looked back.
Not long after getting the Ferrari, he took it to Thunderhill for 2 days of hot lapping. When he got back, he took it into the dealership to have the brake rotors turned and have new brake pads put in. That service cost $2500!