These are my recent spa costs on a birkin. (August 2023)
Clean $555
Re-glue handles $210
Re-stitch gussets $155
Replace turn lock. $355
In agreeing to the estimate, all I really wanted was to have the bag cleaned, but they would not take no for an answer on the rest of the work. They kept calling me back until I said yes to all of it. I think they would have let me pass on the turn lock, but claimed everything else was necessary to maintain the structure of the bag.
It was sent to LA. They quoted me a couple of months, but it was a year before I got it back. Having heard about the long times associated with spa work, I did not think twice until I hit the 1 year anniversary of dropping it off. I emailed them and inquired. It turned out it had been at the boutique for some time and they failed to notify me.