Need help finding info on these speakers ar-s2500dch

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I see these acoustic research speakers on gumtree
https://www.gumtree.co.za/a-speakers/blouberg/ar-+s2500-floorstanding-speakers/1002208338760910000350509
Pics look good but after googling for specs or reviews, not a single web reply searching with the model number.
Can anyone shed some light on tthese of have any info. I can't tell if it's worth the price or not.

 

[Gerlach]

 

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[Gerlach]

 

[HB]

 

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[Brian Bester]