Hey Jeff -
1) These listings all appear to be pulled from RealtyTrac. Basically, the foreclosure listings from RealtyTrac are NOT listed for sale. There appear to be two types of "foreclosure" listings - Notice of Foreclosure and REO. Neither of these have been actually listed for sale.
Notice of Foreclosure (or Notice of Default)
Property owner has fallen behind on their payments and the mortgage company has filed a notice of foreclosure at the county courthouse (required by law before they can proceed with the foreclosure). Unless the current owner pays the penalties and missed mortgage payments the bank will repossess.
The bank has already repossessed the property but it is not listed on the MLS ... yet. It depends on the bank but it can take up to 3-6 months for a foreclosed property to be listed as a bank owned on the MLS.
Once the property has gone back to the bank and been listed for sale through an agent it will show up as a regular resale. My recommendation is to ignore the "foreclosure" listings unless you are a hardcore investor who has a lot of time to contact owners who are in trouble. You could try to contact banks directly but that is pretty futile given that they can't handle that kind a call volume.
2) The price listed for the "foreclosure" properties is more than likely entirely based on the amount owed to the bank that is foreclosing. It has no connection with what price the property will be listed on the MLS after foreclosure proceedings are complete.
3) Can be 3-6 months after the bank forecloses. As I said, I wouldn't waste any time tracking foreclosures - there are plenty of bank owned homes listed on the MLS already.
You can use FranklyMLS to search for bank owned homes only - try one of these -
Reston bank owned
20190 bank owned
If you need any help with advanced searches just let me know. Hope that helps.