A DPE in OK for the CFI Initial goes for 550, and a re-check for 275 OK only has one DPE who is allowed to do CFIs that I know of, and her failure rate is the same 80+% that the OK FSDO has......I know what line of work I'm getting into when I "retire." A few checkrides a week in the tax free cash form that they all love must make a nice supplement.