Here are some pics of an NOS tip. All of the repros I’ve seen do not have the two stamped nipples on the end the pipe that goes into the muffler. Originals have a weep hole on the underside of the pipe. Some of the cheaper repros don’t have the baffle inside the trumpet and/or the baffle doesn’t look the same. Most of the NOS I’ve seen have the white part number tape around the pipe. I can’t help with current prices, I haven’t been watching lately. They used to go for about $250 each but that might have been 10 years ago or so.
I just sold an original set that were good for a survivor type car but needed restored for $300 plus shipping. I would think Nos at $250 a piece is a steal these days.