Lime can be in powder, liquid or pellet form. The powder form is the cheapest and best IMO, but it is very dusty and best spread with equipment designed for covering fairly large areas, two, three acres or more. Some co-ops have lime buggies that can be rented and there are custom applicators that will deliver and spread for you.

The pellet form is sometimes the small food plotters best choice. It is usually bagged and more easily handled, but can get expensive if you have a low PH that calls for up to 3 or 4 tons per acre.

Depending on how close to a quarry you are located will a lot of times determine the price. Where I'm located, the quarry is 6 miles away and I can get it delivered at dumped (i spread it) for $16 a ton.

Here a pic of how dusty powdered lime can be while spreading.