That's a very general question. An adult beardie needs a 40g long tank, minimum. We have our baby in a 40l now, and when our savannah outgrows his 75l, this will be her new home (which I understand is the best for them). There are many, many happy beardies out there in a 40l.
As for pricing... Prices vary by store, geography, and website.. Here, you can get a 40l tank w/ screen top at the petco for about $100, but we got our 75l for $150 new, with the screen top... Bulbs can run from $1 for a regular house-hold bulb for basking to $50+ for MVB's. You can get UVB tubes online for about $20-$40, and these can go in any fixture from your local home improvement store.
What exactly are you looking for?