I'm in the UK, so this offer is for UK people only!
I have a load of old spectacles: I'm going to go and put them into the optician's 'donation box', but if there's anyone interested in some before I do that, please PM me.
Some are 'normal' lenses, some are vari-focals. Nothing especially strong, around -1.5 to -2, with some mild astigmatism thrown in. Some are maybe 10 to 20 years old, others more recent.