Gumtree is an Australian sale site that I frequently check to see what guinea pigs people are selling and rehoming. I've seen some bad ads before, but these look pretty awful:
https://www.gumtree.com.au/s-ad/seville-grove/other-pets/guinea-pig-farm/1045083939
https://www.gumtree.com.au/s-ad/armadale/other-pets/guinea-pigs-for-sale/1045409893
They are both seemingly from the same person. They call themselves a guinea pig "farm" and the animals appear to be being kept in very poor conditions (a small plastic box). I have reported them (by clicking the "!" icon) but I am unsure as to whether or not Gumtree will do anything about it, but hopefully they will remove the ads if enough people flag them!
https://www.gumtree.com.au/s-ad/seville-grove/other-pets/guinea-pig-farm/1045083939
https://www.gumtree.com.au/s-ad/armadale/other-pets/guinea-pigs-for-sale/1045409893
They are both seemingly from the same person. They call themselves a guinea pig "farm" and the animals appear to be being kept in very poor conditions (a small plastic box). I have reported them (by clicking the "!" icon) but I am unsure as to whether or not Gumtree will do anything about it, but hopefully they will remove the ads if enough people flag them!