That's a pretty big exaggeration considering the 4GB Raspberry Pi 4B typically sells for $55-60. This adds a keyboard and case for $10-15 on top of that.
yes, it's a great price for a great piece of kit, don't get me wrong. but if the price is still an issue (as implied by free monitor), it shouldn't be a big exaggeration to expect to find a second hand Pi4 for $40-50
