Here are a variety of treadmill models that sell for under $500.
Walking Pad with 12% Incline, Under Desk Walking Pad Treadmill with Handle Bar & Removable Desk Workstation, 3 in 1 3.5HP Foldable Treadmill 300lbs Capacity for Home Office with Remote Control Price: $469.99
WELLFIT Treadmill with 15% Auto Incline,400LBS Capacity,Foldable Treadmills with Adjustable Handlebar,Heart Rate Sensor,LED Display,App Control,4.0HP Heavy Duty Treadmill for Home,Seniors,Adults,Teens Price: $479.99
HARISON Treadmill for Home with 3.0HP Running Machine with 300 lbs Weight Capacity, Bluetooth Speaker, 17.72" Wide Tread Belt Price: $459.99
ATEEDGE Auto Incline Treadmill, 20% Incline, 3.0HP, 10 MPH Running Machine, 18.5" Wide Belt, 350 lbs Capacity, Treadmill for Home with Bluetooth App Price: $419.99
Incline Treadmill Foldable, Smart Portable Treadmills for Home with Body Fat Measurement & Heart Rate Sensor, 3.5HP Heavy Duty Folding Treadmill 400 LB Capacity with Silent Shock Absorption Price: $469.99
Hccsport Treadmill with Incline, 3 in 1 Under Desk Treadmill Walking Pad with Removable Desk Workstation 3.5HP Foldable Compact Walking Treadmills for Home Small Office with Wristband Remote Control Price: $469.99
8.7MPH Incline Treadmill for Running and Walking, 3.5HP Quiet BLDC Treadmills for Home with Double Deck Technology, 350 lbs Weight Capacity, APP, Heart Rate Price: $439.99
Walking Pad Treadmill with Auto Incline - 18"x43" Wide Full Deck 6 Levels 12% Incline, Portable Under Desk Treadmill for Home Gym Office, 350lbs Capacity, 3.0HP Quiet, Upright Stand Space-Saving, APP Price: $474.98
EGOFIT: Walker Pro M1 - Cool Grey - Under Desk Walking Pad Treadmill, 5% Incline, LCD Display, Remote Control, Home & Office, 220lb Cap, 0.6-3.1mph Price: $419.99
Big Running Deck Treadmills for Home with 15% Auto Incline, Folding 3.5HP Real Brushless Treadmill with Convenience Console and Heart-Rate Handrail, Small Treadmill with Dual Cushion System/Speaker Price: $499.99