After closing, the selling agent said that coming in higher than asking was what sealed the deal, even though we could have offered asking price but had to come out of pocket for closing. 

If you're on a base I can't help but believe that there is someone on the base who is a notary whose seal would be accepted in the US.

In 2018 Baltimore County is requiring carbon monoxide alarms / detectors to be:hardwired with a secondary battery backup (similar to smoke detector requirements in Balt County now)battery must be sealed, tamper resistant, and must last for a minimum of 10 yearsconnected to an on-site control unit that monitors the carbon monoxide alarm remotely so that a responsible party is alerted when the device activates the alarm signal and receives its primary power from a battery or the control unit(Ref: Baltimore County Notice with details)The one in bold specifically concerns me.

Once that is taken care of you can seal as Michael mentioned previously.

Is there a way to seal, or mud the new drywall so that I don't have to tape and feather on the old walls and ceiling and then paint them?

Painted the ceiling, installed the new ceiling tiles, massive drywall work, we ended up pouring 87 bags of self leveler to create a new subfloor which we later sealed.

They might need some reglazing (the putty that holds/seals the panes).

Here's how you seal the deal to get the comps when you need them, ask 'when I talk to sellers that lack the motivation or equity to make good wholesales, would you like me to call you, so you can get the listings?'

I took a real estate agent with me so if I couldn't seal the deal, I would hand it off to the agent and at least get a referral fee on a market listing since I am an agent. 

I am encouraged by younger people as there seems to be no argument from them on climate change and they seem a bit more interested on how to change things.With last years cold winter in Chicago brought  more awareness to homeowners on the benefits of insulation and air sealing on there comfort and gas bills.