OP doesn't say anything about what option it is, he doesn't say how far OTM it is... so it can be 30% out where obviously anyone would sell for 0.65 but nobody buy for even 0.01...
If a quote is 0@0.60 it doesn't mean fair value is at the midpoint... could be anything really... anything from 0 to 0.60
He did say "slightly out of the money". I took him at his word