Actors Keanu Reeves and Jonathan Frakes are among the celebrities offering fans the opportunity to chat one-to-one via Zoom during lockdown.
Reeves is auctioning a 15-minute Zoom call for a children's cancer charity.
The highest bid at time of writing is $9,800 (£7,800).
Meanwhile, on the celebrity message platform Cameo, £166 will buy a 10-minute Zoom call with Star Trek actor Jonathan Frakes or skateboarder Tony Hawk.
Cameo said there had been "a tonne of interest" in its Zoom service, Cameo Live, despite just 31 celebrities - only four of whom are women - signing up since launch, on Sunday.