ProtoPenny was the thrid penny auciton scrippt I tried, and the only one that wactually worked as advertised!
Nash is a pleasure to deal with and was very willing to make modifications I requested, and prompt in getting them done.
ProtoPenny is every bit as good as scripts costing several times the price, and easy to work with.
All in all, one of the best experiences I've had when buying scripts, and I would recommend to anyone looking to develop a Penny Auction site to seriously consider ProtPenny. You won't be sorry!