It is opinion. The only thing we know for sure is that their are offers and bids in the high thirteens right now. Everything else is opinion. Value is what a willing buyer and seller agree on.
If only we knew for sure that those were the real bids/offers, and not the market makers themselves trying to maintain a certain profit level by simply massaging the numbers inside their database. Do you really have trust in the unregulated market makers?
If I want to buy right now, I know what I have to pay. If I want to sell right now, I know what I have to charge. If the volumes are high, the price will move to the next best offer/bid. You are right that the market depth chart is not completely reliable, but for small amounts, it doesn't hardly matter at all.
Buyers may think its overvalued and sellers think it's undervalued. They meet in the middle just the way they are supposed to if they want to transact now. otherwise they bide their time and take their chances. Both sides.