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I paid $390 for one of these back in mid 2020 when it was a bargain back then.
They are very effective and distribute heat evenly to every tray. The main reason I bought one was that it can go up to 75 degrees for jerky.
The one I have is still going very well and recommend it.
Edit: Just seen for cheaper on ebay https://www.ebay.com.au/itm/154782939085 but only 3 available and 0 feedback.
This is the same price as Amazon, and was only $212 at the end of last year.