here is one answer,
Note typical trading otc below $250-$800K+ plus 5-20% retained equity ownership
We are more or less in the right ball park
this was found very quickly with google
OTC Bulletin Board The most popular type of public shell for conducting a reverse merger is the OTC Bulletin Board public shell vehicle. The OTC Bulletin Board is operated by the National Association of Securities Dealers (NASD) and requires that all companies whose stock is traded on the OTC Bulletin Board (or Nasdaq or Amex) maintain their current reporting status with the Securities and Exchange Commission (SEC), which includes current audited financial statements. OTC Bulletin Board shells come in various forms and packages, with some currently trading and some non-trading.
Cost: (non-trading) $150,000 - $250,000, plus 5 - 20% retained equity ownership
(trading) $250,000 - $800,000+, plus 5 - 20% retained equity ownership