Quote Sandra The Terrorist="Sandra The Terrorist"Didn't realise they were limited edition. Thougt they were all like that.
Maybe we only sold two hundred?
If he hasn't got it, roofs will buy it.'"
Already got it mate.

Well, I have, but it's got a big newspaper print stain down one side which has never fully come out.
The shirt in question is the 2005 home shirt, not the NRC Final shirt. They were both very similar shirts, but this one (with the 1980 player names on the sleeves), was worn for the full season, whereas a similar round-necked one was brought out purely as a one-off shirt for the final. Now, the shirt in question will have been released and sold in decent numbers (for an NL1 club as we were), whereas the NRC Final shirt was limited edition and so presumably only 200 or 300 were made. I bought the NRC Final shirt for £25 from eBay in (I think) 2010, then decided to sell it a year later only got the same back. So, in my opinion the shirt the OP's friend is selling is not really worth a great deal because like I said, it is only the 2005 replica home shirt, not a limited edition shirt (same as you can get a 2005 Hull FC replica home shirt off eBay for £10-£15 max).
If I was the seller I might have held on to it for three years so that they could advertise it as a decade old, but as it is if I was selling it I'd be happy with £40 to be honest.
I tell you what is more rare IMO - in 2004 we brought out an all-red shirt for the Arriva Trains Cup Final against Leigh, but strangely the team didn't end up wearing it on the day.

That shirt I would say is quite rare (it was made by Kukri). I bought one for a tenner off eBay maybe seven years ago, and got £35 for it at a later date.
Over the last few years I've loved seeing the retro reproductions that have been made (inc mine and East Hull Red's Hanson White project

), but would love to see a reproduction of the white with red band and white with blue band cotton Riding Bitter shirts that we had around the time we moved grounds (the ones with the HUGE v-necks!

), something about them shirts I just love, even though it was 4-5 years before I started going.