I think the relevant comparison is that LWB got bought out for...

I think the relevant comparison is that LWB got bought out for about $350M which translated to a share price of about $5.25 and the multiple was pretty high (around 40x perhaps - all the info is available from an onlone search); the same market cap implies a share price of around 30c for GRB if they don't issue any more shares.
If my assumptions about shares on issue are correct then when LWB listed in 2005 with a profit of $2m-ish they had a market cap of about $60M.
I was lucky to get a small holding in LWB in the float and happily held until the end and even had the joy of attending the final shareholders' meeting to celebrate the sale. They listed originally for $1.
My opinion is that GRB needs to prove an ability to turn their sales and markering activities into consistent cash generation for shareholders or illicit interest for a takeover before we'll see serious returns.