Sounds like Express Scripts ceo George Paz is bracing himself to get tossed off the island.

The poor guy issued a statement this morning saying his PBM can’t raise its offer for Caremark because a fair appraisal is impossible. And so, his last bid is his “best and only” offer without due dilgence. Paz has been regularly frustated during this saga. Earlier, Caremark’s board was harshly criticized by shareholder advisory firms for failing to conduct an open bidding process.

Caremark, which prefers a CVS bid, has repeatedly spurned Express Scripts. Last week, both Express Scripts and CVS raised their bids for Caremark to about $26.5 billion. But CVS shareholders are scheduled to vote Thursday, and then Caremark shareholders will vote on the CVS offer this Friday. The Express Scripts bid, meanwhile, faces further scrutiny from the Federal Trade Commission.

Here’s the full statement.

[tags]Caremark, CVS, Express Scripts[/tags]