In reply to ewanjp:
There's probably legit stuff on there, but I wouldn't trust Amazon to notice every time if someone did try to sell fakes. I've read horror stories in the past (not specifically related to climbing gear) of fakes getting mixed in with real stock. So that even when you buy from an Amazon vendor that's legit, if their orders are fulfilled by Amazon their legit stock could get combined with stock of the same product from another dodgy vendor. And then there are question marks over how they handle returns...
https://arstechnica.com/tech-policy/2024/07/dirty-diaper-resold-on-amazon-r...
For the sake of twenty quid, I'd go with almost any other company, partly for peace of mind and largely just to avoid contributing to a morally bankrupt business model.