I wouldn't ignore the email/ text Nell, it'll just inflame the situation. It is also kind of passive aggressive.
I would just drop him a quick line saying something like.
'Hi
Got your messages, thanks. I will most likely be out on Sunday but the house will be free for you to come round then. I will be working all of next week so it is probably best if you are here to meet with the valuers and let me know the outcome. I am happy for you to handle all this side of things.
With regards to our meeting about finances I would like to discuss (then list them). I could probably meet Wednesday evening of next week at the coffee shop (or wherever and when ever you are free to meet).
Nell'
I would suggest that you probably be out when he comes to collect his stuff as it will be hard for you to see it all happening and not react. Just my opinion.
