The Boot Sale circuit time of year is coming up again, it may be a good idea for you to get rid of them there. Put all the "recorded off TV" VHS in a box and sell 10 for a pound, for example. If the price is cheap enough people will just buy them, it's not like �1 is that much...
Some people may just want them to record off TV, but then again some people might buy them just to watch something. It's actually quite fun to just watch what other people have recorded as it's a surprise what you see... a bit like a lucky dip...
Also, because of the cheap price people won't be annoyed if the quality sucks, you get what you pay for.
Boot fairs are also really good of condensing down your belongs, most of which you probably don't need (everyone is like this, don't take offense).