50 pounds for a PNT is cheap these days but make sure it's a PNT and not the Asian Soft Shell Turtle which some ppl wrongly identify as a PNT.
I don't think it's a good idea because the RTC can be pretty aggressive and my 7 incher tried eating up my PNT's tail. Someone else I know had the same thing happen to his PNT when comm with a RTC.