I've bought a lot of these cards (over 200), and am making them available for 8.50 per card. They are tested for TX/RX being with in 3db of each other to a known good card on 3410 MHz, which you will not find on eBay :)

These cover 3400 to 3700 mhz, and do 5, 10, 20 and 40 mhz channel sizes with +25dBm (600mW) output. These cover the top 100 mhz of the 9cm ham band in the US (3300-3500), and this is one of the few bands that is not shared with ISM users. Mikrotik sees them as 5ghz cards, and you just subtract 2ghz from the frequency to get the real operating frequency.

Pictures of the innards: http://gallery.keekles.org/v/Radio_stuff/UBNT-XR3/ The UBNT website on them http://www.ubnt.com/xr3

Bart, AE7SJ, from the hamwan project has done some testing on them across the entire band and has the results up here https://www.hamwan.org/t/tiki-index.php?page=Ubiquiti+XR3&structure=HamW...

If you want some please email me offlist. I'll be bringing some with to Dayton and can meet people Thursday afternoon till Friday night to get them to you. If you want to do this I need your cell number and the number you want.

73's and lets get some high speed packet going on 9cm!