MOOSOODirect via Amazon has MOOSOO RT50 Robot Vacuum with Mapping Technology [amazon.com]
for $99.99 and free shipping.
Make sure to clip the 20% coupon on product page and use the coupon code NQHUNLZZ at checkout.This code works for all colors.
List Price: $229.99
Sale Price: $199.98
20% coupon on product page: $159.98
Additional 30% coupon (NQHUNLZZ) at checkout: $99.99