Yeah, $5 is also my breakeven point for those preferred stocks. I also received some shares as dividends for a time, which I assume brings down my average cost a little.
I have some memories of thinking about selling when it was in the $1.50 range pre-split. I also remember a very brief jump up into the upper $2s after an article mentioned the project (I think in the Economist). This was a long time ago, so my memory might be off. I think my shares were still restricted at the time.