Parking is unavailable on most of the sites and outrageously overpriced on Stubhub. From about an hour ago:
Spothero is the biggest of the parking sites and they have not yet listed any passes for Tuesday. Meanwhile a number of fans are reporting that they have purchased Spothero passes by selecting the date and time instead of the event. My expectation is that Spothero is preparing to cancel all of the already purchased passes and is working with the sites to set price levels. They won't be cheap but at least they will be available.
None of Spothero, Parking Panda or Parkwhiz have parking listed yet for the event. PP said the time hasn't been set.
This is good news for us procrastinators, there will be a flood of tickets available perhaps tomorrow morning, just check back frequently and get a lot of choice.