From December 2011 to January 2012, the most recent data available, home sales increased by four percent.  That could be because of two key factors: home prices are down and interest rates are down.

In fact, it's easy to see why more people might not only be dipping a toe in the water, but jumping in with both feet!

Right now, there are homes for sale at half the price they went for during the real estate bubble.  They're available at all price points, all across the country.

Here are three examples featured today on " Good Morning America":

San Diego, Calif. area

Listed for $495,000

Last sold for $990,000.

http://www.zillow.com/homedetails/16575999_zpid/

Hawaii

Listed for $249,000

Last sold for $510,000

http://www.zillow.com/homedetails/534-Kaikoo-Pl-Wailuku-HI-96793/745518_zpid

Anoka, Minn.

Listed for  $109,900

Last sold for $239,000

http://www.zillow.com/homedetails/206-Fremont-St-Anoka-MN-55303/1500243_zpid/

Here are more examples of houses for sale at about 50 percent of what they cost during the real estate bubble years.

Atlantic City, NJ

Listed for $145,000

Last sold for $235,000

http://www.zillow.com/homedetails/301-Zion-Rd-Egg-Harbor-Township-NJ-08234/37797513_zpid/

Auburn, Ga.

Listed for $164,900

Last sold for $275,000,

http://www.zillow.com/homedetails/759-Key-Largo-Ct-0-Auburn-GA-30011/2121760276_zpid/

Cape Cod, Mass.

Listed for $149,000

Last sold for $240,0000

http://www.zillow.com/homedetails/102-Lincoln-Rd-Hyannis-MA-02601/55845801_zpid/

Carbondale, Colo.

Listed for $450,000

Last sold for $989,200

http://www.zillow.com/homedetails/155-Juniper-Trl-Carbondale-CO-81623/82404082_zpid/

Charleston, South Carolina

Listed for $149,900

Last sold for $275,000

http://www.zillow.com/homedetails/1025-Riverland-Woods-Pl-APT-102-Charleston-SC-29412/68393568_zpid/

Meridian, Idaho

Listed for $130,000

Last sold for $200,000

http://www.zillow.com/homedetails/1934-W-Whitestone-Ct-Meridian-ID-83646/79698494_zpid/

Oak Island, North Carolina

Listed for $449,000

Last sold for $955,000

http://www.zillow.com/homedetails/3316-W-Beach-Dr-Oak-Island-NC-28465/78236117_zpid/

Vancouver, Wash.

Listed for $125,000

Last sold for 235,396

http://www.zillow.com/homedetails/5615-NE-75th-Ave-Vancouver-WA-98662/70582733_zpid/

Washington, D.C. area

Listed for $245,000

Last sold for $525,000

http://www.zillow.com/homedetails/37042-Charles-Town-Pike-Purcellville-VA-20132/12422999_zpid/