The Price for Thermal Imaging depends on what you want. do you want radiometric imaging or simply colorful pictures? resolution? the cheapest ones are 160*120 and a slow refresh rate (15-20ish FPS) the most expensive are 640*480 (new camera by flir) and a nice 60fps. cheapest=8000US(approx) most expensive=50,000US (approx). For playing around/building diagnostics 8000 should be fine but if you need better quality you have to pay to play.