Sony SS-AL5 MK2 - new in original box

[GRO47]

Hi all. New here and haven't posted before so apologies if I'm unfamiliar with the terminology etc. I'm really looking for any feedback on what a pair of Sony SS-AL5 MK2 speakers might be worth and where to sell them - they're new in their original box and have been hiding in a loft for the past 25 or so years. I can't believe how heavy they are. Anyway, any comments or suggestions appreciated. Many thanks. Glenn.