BELOW IS THE WARRANTY OFFERED BY IMPORTERS OF CHEAP UNITS
This should tell you something about the quality and why they are less.
 

Product Warranty: All L.O.W. brand blowers are covered by  our 3 month, limited warranty, from the date of purchase. Warranty only covers  L.O.W. considered product defect. L.O.W. reserves the final right to grant  warranty approval. User is responsible for all warranty return shipping. If  L.O.W. approves the warranty request the user will be reimbursed for shipping  within 14 days. Cases will not be approved for WATER DAMAGE, WEATHER  DAMAGE, MOISTURE DAMAGE, HEAT DAMAGE, or SUN EXPOSURE DAMAGE, misuse, neglect,  or user error.  Approved warranty cases will be issued a  replacement unit. All L.O.W. brand sky dancer attachments are covered by our 10  day limited warranty, from the date of purchase. Warranty only covers L.O.W.  considered product defect. TI reserves the final right to grant warranty  approval. User is responsible for all warranty return shipping. If TI approves  the warranty request the user will be reimbursed for shipping within 14 days.  Cases will not be approved for WATER DAMAGE, WEATHER DAMAGE, MOISTURE  DAMAGE, HEAT DAMAGE, or SUN EXPOSURE DAMAGE, misuse, neglect, or user  error.

COMPARE FOR YOURSELF.
OUR UNITS LAST 10 X LONGER THAN IMPORTS AND 2 X LONGER THAN OTHER U.S. MADE UNITS.

OUR AIR DANCER WARRANTY IS A FULL 6 MONTHS ON THE BODY
That is 1450 hours based on 8 hours day x 7 days a week x 6 months.

OUR FAN WARRANTY IS 3 YEARS
That is full replacement for first year and 50% discount replacement off our already discounted price for 2nd - 3rd year.  Our fans will last 5 to 10 years.