You can buy a FLIR Boson at 640x512 for that price. The cost of thermal cameras is roughly linear with the number of pixels. I realise that's not cheap, but you

You can buy a FLIR Boson at 640x512 for that price. The cost of thermal cameras is roughly linear with the number of pixels. I realise that's not cheap, but you can get double the resolution (e.g. 4x pixels) for the same money.