fencesmart.net
fencing.net
physicalchess.com
thefencingpost.com
blade-fencing.com
Absolute Fencing
There is fencing equipment on ebay, and craigslist.
usfencing.org is the official site of the U.S. Fencing Association. You will need a membership with them to fence in competitions. They also have information on fencing in the U.S.
*Most vendors have starter sets starting around $90-$110.
Iron Works Fencing 