This is the inflatable I own.
I bought it from Amazon for $360.
There are none of them there now but I found one for more money on eBay.
I doubt the materials used to manufacture it are as good as the more well known brands but this is season number five with zero issues.
I do keep it inside so sun resistance doesn't matter for me.
https://www.ebay.com/i/352276397913?chn=ps