Edited February 26, 2021
at 09:33 AM
This seems to be about $10 less than what I usually see as the lowest price around at any given time (recently I've been seeing it an otherwise low of ~$65 @ Dell.com & B&H).
The Desktop set, which includes the keyboard + separate num-pad as well as the sculpt mouse is usually $120+ and occasionally on sale for ~$100 (~$110 @ Dell.com now). It's not a $45 mouse for me though, so I prefer this set.