Stocks with available Pre-market prices vs those without?

I'm having trouble finding a clear difference between stocks that have pre-market prices and those that don't. For example, VDSI does not have a pre-market price on Google Finance (you can get a quote on MarketWatch) but BBRY does have a pre-market price (which you can find on Google Finance, NASDAQ's website, etc).

Was the 22.80 opening price on VDSI I read on Market Watch this morning just an estimate? It wound up opening above 23, where as BBRY opened arond 9.80 which coincided with its pre-market price.

Thanks

Submitted March 27, 2015 at 01:09PM by HowYaGuysDoin http://ift.tt/1956G8y