I'm amazed at the low inspection fees that some posted. In those few states that still have annual safety inspections. I would guess that the cheap ones are at state run inspection stations? Standard annual safety + emissions inspection cost in Pa. Is about $85. A lot of garages cut that down to $70-75. Up until about the mid 1980's we had safety inspections every 6 months. Anything aftermarket on exhaust, even a pipe diameter variance, flunked. Most used Pa. trade ins were bought by carloads of southern dealers. A Pa. inspection sticker, even expired, was worth a substantial mark up.
I was only in Fla. from '73 to '75, but at that time they had no safety inspections. It was a common sight to see cars without doors. Another deep south state sold license plates through the mail for $5 or $10.