Lizards can make excellent pets, but first you must be prepared for what you are getting yourself into. they can grow up to 24 inches, their lifespan is 4-10 years.
Bearded dragons are not so expensive, but do require the investment of a good terrarium and UVA/UVB lighting to keep them warm.
For a single bearded dragon a bare minimum of a 40 gallon tank will be necessary, but bigger is better.
A secure lid will also be necessary.
here is a link to a company that breeds and markets bearded dragons and other types of exotic pets:
http://www.dachiu.com/