It seems strange that a Deluxe reissue would need filter caps already.
I used to have a $50 bench fee that was also the first hour If I got the job. I then was $45 an hour. There is no reason not to have a mark up on parts. It's how service and retail make money. We all deserve to make a living if we work hard. You will get the vintage amp with some weird ass parasitic oscillation that will kick your ass that you can't charge for.........there goes your profit margin! Good luck. I got sick of artistic wannabees that wanted me to keep tweaking shit so maybe they could sound great.