Bonhams has cancelled "all non-essential events until April 15" - They quote that salesrooms will be open and viewing will be possible. Means, we do not really get what Bonhams avoids... Actually, online-auctions are a proper way, proven and obviously relevant theses days.
Our best advise: listen to the authorities, follow their instructions, it's about life and this time it's about Y O U R life. Please take care of yourself!