M.C.
H C- We just moved into our new home at the beginning of April and had the house sealed for scorpions. We used the Scorpion Specialists. Ask for Chris.
http://www.scorpionspecialists.com/index.html
They are part of Knock Em Out pest control who now comes out and treats the yard once per month at our request to make sure that the food source for the scorpions is gone. We paid $850 to have our house sealed which was inside and out and included an initial internal and external spray. They estimate the cost by the square feet of your home. The monthly cost is $45 for the yard. The guy just came the other day and we got this month free. Totally unexpected but awesome.