Anybody ever buy miners off Amazon

I’m looking to use to buy a couple Canaan miners from Amazon.ca as they are the only place so far I could find that would take my credit card. The seller though Qio Tech doesn’t have any reviews over the last year and the ones before that are for other things (not miner’s). I’m nervous that someone bought this Amazon seller account with 5 stars and then are going to take my money n not send me the miners. Which would basically ruin me as I’m looking to spend 17,900 out of my 18,000$ credit card limit