I don't like NTE, but not because they won't work. But they do cost three to ten times as much as real parts. That is a lot to pay for a poly bag with the part number. For individual parts, they usually work OK, where they fail is in a row of power transistors. If you replace the entire row with them they likely work, but if you mix one of them with say Motorola somethings, they won't share current well.
I've also sent in a request to Pioneer for these transistors. If the price is reasonable, I'll go ahead and purchase some from them. The NTE's cost is only $1.59 so it's not like I've spent a fortune. I'll let you all know how this turns out in the end. Thanks for all the good advice...
Up here in Canada it's unlawful to use used parts without the written consent of the person you are doing the repair for. The only time I have done this is when the only part available is used.
For me, it is much easier to use new parts and keep them on-hand.