Very interesting. If only it wasn't so expensive to start with. A bit out of my budget for my tinkering. Still always happy to learn new things about watchmaking, even if i can't immediately adapt it. Some day, some day. :)
You could get by with just 9010, HP1300 and Molykote for a very basic service, but you're still paying around 60€ for it. So yeah, not cheap, but for a hobbyist that will probably last longer than it's shelf life...
To start servicing watches, bare minimum including oils will set you back at least $500 to get the proper tools and even swap out some cheaper tools where possible instead of the premium ones, but to have pretty much everything you need. $1000 easily. Remember you need cleaning supplies, timegrapher, and basic tools, etc...Oils are expensive but those three or four bottles at about $150 will last you for well over a thousand services. You could get away with one oil and one grease but it's not advisable for quality servicing. I see this channel has watched Alex from Watch Repair Tutorials on "Watch Lubrication for Beginners" This video is spot on, but if you feel you want a detailed explantion. thats another good video.
I’m not saying that you’re not right but it’s too expensive for the hobby and I asked a few of my friends the service watches and they told me they don’t pay attention to that he just require expiration date for selling is synthetic not organic