That does seem really high to me. I've paid in the $65-80 range for a tune up. My daughter-in-law had an inexpensive Singer that the bobbin case area had some issues. She bought the machine at JoAnn's. When it stopped working she had to send it out to be repaired to a place JoAnn's uses. The repair estimate she was verbally given seemed reasonable. When she got the bill it was nearly what the machine had cost initially. Within a few months after getting it back it broke again in the same place. The 90 day warranty that had come with the machine had expired and there was no warranty on the repair. I found a good used machine for her which was better quality and she uses that now.