Beware that gottlieb used loctite on most of the playfield posts on system 3 games. Usually you can heat the posts (with a soldering iron cranked to max), then remove, but sometimes they will twist and shear off, requiring you to replace the post and t-nut.
$200 sounds like it could be on the low side, especially if the shop job takes more than 8-10 hours (which it probably will).