Options Prices on the ASX website

yes, there is hardly any spreads/interest.

I found this underneath option prices on the asx site which explains a bit:

Where there are no market prices quoted, a theoretical fair value will be displayed in the Bid and Offer cells. You can distinguish the fair value quotes from actual market prices by the fact that the same theoretical fair value is displayed in both the Bid and the Offer cells.

Market prices will be delayed by at least 20 minutes. Theoretical fair values are updated at approximately 10.50am, 12.50pm, 2.50pm, 4.55pm and 6.20pm.

Click to expand...

So, if the bid and ask are exactly the same, it means that there are no market maker quotes at that time and only a theoretical value has been calculated. As the ASX only update theoretical values every two hours, it is limited in it's usefulness.

It certainly doesn't show how wide the bid/ask spread is likely to be for realtime MM quotes - and if the options are not liquid, those spreads can be quite wide and, in my experience, the MMs rarely budge from their price when it's down to just you and the MM.