They are pretty much money grab / scam prices.

Trainer table

https://www.wiggle.com/lifeline-trainer-table (or a $30 laptop cart)

Fan (with a $5 remote)

https://www.amazon.com/Lasko-U12104-Velocity-Ventilating-Exhausting/dp/B07YKXF9VC

Mat (various sizes):

https://www.amazon.com/Sunny-Health-Fitness-NO-074-M/dp/B01GSMN9WY