As D Stanley wrote, the Black-Scholes model prices this put at 42 cents which is in line with a quote of 30x50 cents.
Another thing that should be taken into account when pricing out options is a pending dividend. Since share price is reduced by the amount of the dividend by the stock exchanges on the ex-dividend date, option premium reflects this. Relative to each other (same series), puts gets more expensive than calls. For at-the-money options, the dividend is about evenly spread across both.
IOW, if the dividend is 50 cents, you would expect the put to increase by 25 cents and the call would decrease by 25 cents by ex-div eve. For options away from the money, the distribution would affect the ITM option more.
This is important because if unaware of the pending ex-div date, one might think that you're getting an inflated and over valued put premium (seller) and conclude that there is more downside protection than there really is. More practically speaking, if XYZ is $50 and it goes ex-div by 50 cents in the morning, receiving 75 cents today for selling the $50 put means that tomorrow morning your put will opens 50 cent ITM at $49.50. That 75 cent premium was effectively 25 cents of time premium and 50 cents of intrinsic value.
Based on the pricing (42 cent fair value), I'd surmise that there is little to no dividend involved in the pricing of your $75 put.