Have a quick search on here and you can see what the current ask is. It’s a lovely watch and quite possibly a future classic!
If it's been worn and has any blemishes I wouldn't expect to get much more than £5500 for it. Your 9/10 is probably someone else's 8/10.
https://omegaforums.net/threads/sold-speedmaster-speedy-tuesday-1-good-number.89541/ one sold recently on the private sales forum.
Every watch I've ever sold would be worth a lot more now if I had kept it, but I needed the funds at the time. If you need the cash, sell it. If you don't, keep it for a while and see how the market values it in say six months time.
I’ve seen them listed at $7500-8k USD over the past few months that I’ve been watching them. Beautiful watches.
But you will sell it and let someone else mark it. You were one of the original ordering guys weren’t you. That’s just crazy wait a year to get it and not wear it due to OCD then sell it to some lucky guy. (Just busting your balls emoji)