On any given day, there are a wide range of prices in play for both buy orders and sell orders. At the end of each trading days, most market makers pull through remaining unfilled orders from the quotation system so they stop appearing as contenders for the bid and ask prices that are displayed on your computer screen.
However, some market makers do not bother with some of the more divergent price points so that the bid/ask spread can appear in the off-hours to be ridiculously wide.
In other cases, it would appear that the market makers are having a bit of humorous fun by doing things like posting an ask price of $5.00 for a stock that has been stuck at $0.0001.
The bottom line is that you should not pay any attention to off-hour price quotes because they have no relationship to actual viable market prices.
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