Looking for cheapest, but also reliable....thermal imaging device

Before I get crucified with CHEAP doesn't equal RELIABLE!!! No, you're generally right, but I also don't need a $5,000 FLIR camera. Prices range from $25 on Temu to $50,000 on the FLIR website....where do I need to be? I was looking at the FLIR One series cameras, but I don't really know much or have any experience. So I was hoping to find some advice!

I am basically looking for hot/cold spots in my attic and around the house. Just trying to figure out where I need air sealing and/or insulation.