It is worth saying, that with those Aironet APs, if it doesn't expressly say it comes with the antennas and power supply, assume that it doesn't. Cisco actually sells them that way, and you're meant to mix and match which antenna configuration you need (but only certain ones are supported).

They're a good buy, but aren't designed for consumers at all (or to be deployed as small business/home APs).

They're not "normal end user" friendly at all, but once you get them up and working they're great.

I still find it amazing that I can get what is near $1K-original-price worth of industrial-grade AP for less than $100.

Is it even possible to get firmware updates for these without a Cisco support contract?

You can get IOS 12 (autonomous) for it with only a Cisco support login (no contract), but I had to ask a friend for the IOS 15 image. Got huge performance improvements with the newer version.

This is the AP I got (there's others available for around the same price, but the deal with the two antennas was too good to pass up:

http://www.ebay.com/itm/261985177103

Here's the power injector you need to be able to run both radio modules at the same time:

http://www.ebay.com/itm/252032508098

You'll want the c1250-k9w7-tar.152-2.JA1.tar IOS load to run it on "autonomous" mode (not needing a central controller) and have Chrome/Firefox compatibility for the Web UI if you use it.