I bought my 05 STS4 AWD 1SG as a CPO car last month. Dealer said he pays $1100 to certify PLUS the cost of repairs required to pass the inspection. I can tell you that the dealer I bought from didn't repair squat, just pencil-whipped the inspection. Now, Cadillac is paying to fix the sub-standard stuff under warranty........avoid Audette Cadillac (Detroit, MI) CPO like the plague. I bought mine sight unseen and it is definitely sub-CPO standard. Cadillac Corporate is actually paying for PDR and Paint Work due to this dealers crappy over-representation.