at this stage, heads (GMC) look like opening 2.1c, so minimum fair value price for options should be 2.1-.5=1.6c. If you add in some premium for the time value factor (18 months until expiry), then a GMCO price of 1.7-1.8c is very reasonable if the heads open 2.1c.
GMC Price at posting:
2.0¢ Sentiment: Buy Disclosure: Held