If the full sum of $5500.00 has not been paid to [Desh] and/or [my roommate] by 9:03 PM Eastern Daylight Time, Sunday, April 27, 2008, then all goods (leaven and money) will revert to their previous owners, and this transaction will be null and void from that time on.
This transaction will be valid upon the signatures of all three parties.
(Note: If you definitively know of some halachic problem with the wording here, please don't tell me until after Passover. I really don't want to know. If you just have questions, though, from any background or angle or perspective, feel free to ask!)