just sent you a pm about Windows 10 Pro 64bit, possibly also interested in Office Pro if this works out first...
Can't go first, you are a newbie, although I'm glad to even add a tip for you if they key is legit,
bear in mind that there is a chance Microsoft might disable these versions at a later date if they find out the keys were not acquired 100% officially, so the risk is already on the customer.
Let me know via PM, Best.