Don't want to you flame you. But your question sounds like the following:-
"What Washing machine will wash my clothes?".
For that price, you probably won't get wireless. So you have to fork out for a usb Wii network adapter. SO you might as well purchase a wireless router. People tend to go for brands like Netgear and D-Link.
Surely there is a billion US sites with cheap routers?!?!?
If he is talking about Wireless routers, then all wireless routers has WEP?! MAC Filtering is pretty much standard in most wireless routers - remember to switch it on to prevent hacker attacks.