It is amazing how much stuff we amass over the years, NSquirrel. Reminds me of an old George Carlin routine about places to keep our "stuff." It is so much more difficult to get rid of the "stuff" than it is to acquire it in the first place! For example, I have so many books it is unreal. I went through a lot of them a few years ago and donated over 400 titles to the public library, and despite that huge purge, I sill have way over 1K book left. I need to get rid of more of them, and like you, I have tons of VHS tapes, and now a small accumulation of DVDs, too. The VHS tapes took up so much room over the years! Not only did I buy programmes on VHS, I also regularly recorded programmes off of the telly. I ended up with hundreds of VHS tapes.
I like the DVD's better, though, and now I am very selective about the DVDs I am willing to add to my "video library." My collection is small enough that I pretty much can recall all of them off hand....I have the complete Downton; Indian Summers season one; complete Good Neighbours and complete As Time Goes By; Wild Pacific; Wild China; and the complete Hollow Crown. I think that is everything I own on DVD, and I am determined not to let that collection grow too much larger.
I found that selling on eBay and CL (I think CL is local to the U.S. only) is a good way to get rid of some things and bring in a little revenue at the same time, but it is a lot of work. Prima facie it may look easy, but as you probably know, snapping and uploading photos, creating listings, communicating with both potential and actual buyers, and packing and posting sold items, etc., is very time consuming indeed. I would prefer to sell on CL only so that local buyers could just pick up their items, but CL just does not get the traffic eBay gets, so I end up going back to eBay. I donate a lot of stuff, too. I think if I worked at it like a job for 8 hours a day, it would still take me months and months to weed out everything I need to get out of here.
The lesson for me has been "think twice before you bring home anything new, and try to make a weekly effort to get rid of at least 1-2 things." Eventually, I may be able to see the bottom of my desk again and find the "lost" things around here that I need!