Abstract: A method of facilitating transactions between a first party and a second party. The method comprises, receiving from the first party a first indication of interest for the transaction subject, generating a response and an response reveal date in response to receiving the first indication of interest, and transmitting the response to the first party on or after the response reveal date.

Abstract: The subject invention provides a vacuum unit and a waste container. The vacuum unit applies a vacuum to clean an area to collect debris and the waste container collects waste by a user separate from debris collected by the vacuum unit. The vacuum unit includes an exhaust port in fluid communication with the waste container for releasing a waste liner from the waste container. A transport mechanism supports the vacuum unit and the waste container for moving the vacuum unit and the waste container across the area while applying the vacuum to collect the debris and while allowing independent filling of the waste container with waste.