Craigslist is my best friend.
I bought my beardie from an overstocked breeder for $25.
I found someone selling a 20 gallon cage with screen top, double dome light with basking bulb and red light, water dish, basking rock, electric heat rock, sand for $40. (I don't use the red light, electric heat rock, or sand)
I bought an 18" light fixture from walmart for $7 and put a
UVB bulb in it for $20.
So I spent a total of $85 before food.
Food, calcium:
Crickets are $1.25 a dozen almost everywhere you go.
There are a couple site online where you can buy 1000 crickets for $20 - $30 after shipping.
(
http://www.armstrongcrickets.com/) (
http://www.flukerfarms.com)
For $8, I bought reptivite reptile vitimines with D3 in a 2 oz bottle but it has lasted me 4 months and I still have half.
Greens cost $1 a week, maybe even longer if you can keep them fresh.
All the grocery stores near by have huge bunches of mustard or collard greens for just $1.