I have two 2nd generation airport extreme base stations for sale. A1143 model in case you want to google it. Comes with original A/c adapter, and box. These are not dual band, but it can run 5ghz N only. I used both, I had one run 5 ghz N only, and the other in 2.4 ghz b/g/n mode. Routers function 100%, absolutely nothing wrong with them. I recently got the newer version of the airport extreme, due to it being dual band. I just wanted to get rid of the clutter of two base stations.
Prices are o.b.o. so make if an offer if you think the price is too high. I'll consider reasonable offers.
$80 each o.b.o. or buy both and we'll work out a deal.
Pm if you are interested.
Actual pics of the products for sale below, not stock pictures.