What is the most used Pcr inactivated Dna control or Nattrol for BK Virus Linearity viral reference serum panel (6 X 0.25 ml/vial)?

The NATtrol B. pertussis/parapertussis Positive Control from Zeptometrix Corporation supplied next week by Genprice is the best reagent!!! The catalog number is NATBRD-6L and the price is 210 EUR.