Starting - I think that sending you the photo was a threat and if I was you, I would talk to the police and get on record that he appears to be stalking you, in an attempt to extort money from you. They probably won't do anything, because he hasn't committed a crime, but you would have an incident number and it would help you to build evidence in case you need it for the future.
Please write down and keep copies of everything he says and does.
Wrt collecting his things - he's had long enough. You really do need to stop letting this drag on. I wouldn't contact him any more, but would simply dispose of his stuff or drop it at a friend of his/his mother's house - anywhere that is your house.
Change your phone number, and your email. Anything he sends you through the post, you need to ignore, unless it comes from his solicitor.
Not to worry you, but if he is taking photo's of you when you out and about, that means he is sitting outside of your house watching you and following you. That needs some kind of action.
I think you are being too passive here - he is still calling the shots to some extent and you need to make yourself much less available. if he can't phone or email you, then his options are limited - he has to turn up unannounced (in which case just call the police and say he is harassing you, because he is) or send letters, which are physical evidence, if threatening but can be ignored otherwise.
Sweetheart, I don't mean to nag, but this really has gone on long enough - time to wrestle control back.