We have Safety And Emissions here in Missouri. Safety is $12 and Emissions is $24. I do 2 year plates here so its about $50 (for an SUV, cars are cheaper) for the plate registration plus the two tests.

I dropped my car off at Nissan for both plus an oil change yesterday. Called me back and said I have two leaks.. Coolant and Main valve something-or-nother. Both are covered by my extended warranty luckily. $1500 for labor alone. But I only have to pay $50 (warranty deductible). I only take it to the dealer for warranty work, I wouldn't dare pay their $120/hr labor rate out of my pocket! It didnt pass safety due to the front brake pads, so I get to take it to another place (Cheaper!!) to get those replaced and the drive belts as well. Yippee. It's an 03 Xterra, so 6 years on the belts isnt bad I guess.

They used to have a different kind of Emissions testing here, where you'd take it to certain 'clean air' facilities and they'd hook stuff up to the exhaust and drive it on those stationary cylinder thingies... It was $24 then.. and now they just plug in a cord and read the car's computer.. for the same price! And if your car's too old to have the computer read, you get a free pass. Lucky them... Kind of defeats the purpose, since older cars would be more likely to be causing more pollution than the newer ones.