WiFi antenna help

[mvmacd]

I was going to buy this BIQUAD antenna on ebay [12+ dBi] for about $13, or this DOUBLE BIQUAD antenna [14+ dBi] for $20.. but then I found
this 25 dBi antenna for only $12! It says it's "For Router," but will this work to plug into a USB WiFi Adapter with a RP-SMA antenna connector on it? [this one]. I've already bought the USB WiFi Adapter, a N To RP-SMA adapter, and a 3m M to F RP-SMA extension cord.

Thanks in advance.
Matt

 

[OvenMaster]

Those copper colored ones seriously look like they were soldered together in someone's basement. Steer clear.
The last one is much better.

I'd look at something like this, too. http://www.radiolabs.com/products/antennas/2.4gig/2.4-aluminum-parabolic.php

 

[mvmacd]

I did end up getting the Yagi antenna.. But even though the copper ones were home-made, I have heard of people making their own biquad antennas [google it, and you can find lots of guides], mounting it on a satellite dish, and getting a mile of range with them [supposedly 30 dBi].