roughly how much should i pay for a chapter 7 bk? it is an IRS relief bk with two low balance credit cards.

You pay for what you get in bankruptcy, like anything else in life.  Tax discharge analysis is a sub-speciality within the specialty of bankruptcy so you need to make sure you hire an attorney who understands all the nuances of that. Attorneys' fees vary widely.  Depending on their experience level and abilites, you may find fees ranging from $750 to over $4,000 for a Chapter 7 case.  My articles below on what to look for in a bankruptcy attorney and bankruptcy costs and fees may be illuminating to you. What To Look For When Hiring A Bankruptcy Attorney   Low Cost Bankruptcy Attorneys   Bankruptcy Costs and Fees