DIY Pest Control?

Bought a house 3 years ago and took over a termite contract. Now they want to do a full treatment again(every 10 years right?) And its like $600-700 and $80/year after that. Is that reasonable? If not,
any other companies that you would recommend?

The company says that the last record they have of a full treatment was 10 years ago, however the 2 guys that come out and treat the house every year says it was done after Katrina cause they remember the house.

Any advice? Don't wanna be cheap, but also don't feel like spending $700 if I don't have to. Its a 2100sqft house on 2 levels on a slap if that makes a difference.