I've been working from home since February, and deliberately logged out for a break near the time my bids were due, so I couldn't be disturbed. I'd had the auction on since the start, something which would not have been possible in the office.
I was going to bid on the1871 penny, and a few other pennies. Of course, work got busy just as that coin was about to be bid. It went for £700+, which was not a bad price. Lesson, take a day off work for next DNW auction!
Mike - the Freeman 7 went for £500 hammer - it was the nice F1 that didn't sell, surprisingly. I expect your 7 was a typo.
The 1864 was a good buy - nearly went for it.
I suppose that is possible however under magnification the surfaces just don't look prooflike, or at least like any I have seen as there is a roughness to the devices and fields that does not look prooflike, and of course the edges do not. I've a number of Vicky half crowns as you might guess and does not look prooflike. I have not held other 1839 currency specimens so can't speak for them though.