Where to buy cell phone signal booster device?

the first signal booster is by wireless extenders for $199.99 that could be used in both north America and Canada. it is a Dual-Band Cell Phone Signal Booster for Home and Office, i also planning to get one at my home ,because of weak signal in my vicinity. it can Extend cellular coverage for single or multiple users in homes or offices and provides up to 3000 sqft. of coverage. there also is a Dual-band device that works with 800/1900 MHz frequencies from all major carriers (leaving Nextel out) and a Omni-directional signal antenna receives signals from multiple cell towers.another option is from wilson i.e Sleek Cell Phone Signal Cradle Booster which works with all Cell Phones with Mini Magnet Mount Antenna but could be used by Single User at a time, it also Installs Easily In A Vehicle , Improves Transmitted And Received Signal Levels ,Reduces Call dropping .And increases Range ,Cradle works with all the phones and could Hold Any Cell Phone Securely,Reduces dropped calls, extends signal range, but beware it could escalate the data rates for you, there is a Built-in port for battery charging; adjustable arms to fit most of the phones , it also has the capability to Extend the calling range and signal strength of any phone on any North American cell service provider (except Nextel/iDEN),External vehicular antenna increases any phone's output power to cell towers.