[jimbo2012]

Spa's cost about $5K - 12K for an above ground unit, the concrete built in's cost about $15K-20K.

There are many used for sale from $1,000, (craigs list)that are great these spa's R not used much.
Look for a 220 not 110, they have heaters and a fair size motor that will cost less to operate and heat better with 220V.

If you buy used figure $250 to pickup and move to your home.

You also can sink an above ground unit into the ground to look like a custom build.