c_o_n_v_e_x parent
Living in Australia and interested in buying a business, I can attest to biz4sale-type sites being a real problem.
If you're interested in giving the tool a shot, feel free to shoot me an email (take my username and insert an @ after david and a .com at the end) and I'll happily give you access after I get it up somewhere publicly accessible -- possibly in the next couple of weeks.
email sent!