The repossed house that I mentioned (above) that I'd bought was essentially 'as seen' as the former owner was totally out of the picture.
When I viewed the property it had a garden shed,
Between exchanging and completing the former owner arrived with a low loader and took the shed away.
I complained to the the estate agent and my solicitor demanded that the shed was returned or I was compensated for the loss of something that would have been included as belonging to the property under the 'as seen' terms - as we didb't have a seller's list of what was to be left behind.
Eventually the bank that owned the property knocked £500 off the price so I could afford to buy a replacement shed.
I'm just recounting this as an example of the sort of the problems that can arise when it's not clear in the contract what is being left behind and what is being taken.
When I was selling a house I once had a letter from the potential buyer's solicitor asking me to confirm I would be leaving certain shrubs that were growing in the garden (cordyline australis etc). WTF! They had been planted. They were not in containers!.
I can see no good reason at all why the seller in your situation cannot complete the seller's documents. All personal belongings will be taken by the existing tenants. All fixtures and fittings should beleft unless specifically stated otherwise.
So he's been a jery or lazy or a lazy jerk.
If she (GM) damages the proprty then he's have to claim it from his insurance as the damage occurred prior to your ownership. If you even suspect this may happen - I'd walk away now.
I would get it specifically written into your contract anything you despaertaely want to keep, and that it's sold 'as seen' (take pictures) and that all fixtures and fittings are included.
Better still I'd walk away and find another house as this one has the potential to cause a lot of problems.