Basically two systems are used to purchase photos online:

Credit system:

The credits have a value depending on each agent, the most common is a credit equal to one dollar, although there are agencies where credit is equal to one euro. The usual way is to buy credits by credit card or Paypal.
The credits are valid for at least one year after purchase, depending on each agency. To purchase photos is required to register and there is usually a minimum of credits to buy.

On the credit system, the photos come out much more expensive, but is not obligated to buy a large number of photos a day, month, quarter, semester, or year.

Depending on the number of credits that are bought, some agencies do give more discounts and promotions in their credits.

Subscription system:

The usual subscription per month, quarter, semester and year, with the right usually download about 25 pictures a day.

Discharged in a month 750 photos for an amount of approximately 199.00 euros, on a quarterly subscription, discharged 2250 photos, 4500 photos and semiannual annual subscription amounts to 9125 photos are slightly different at each agency.

Special subscriptions are also available in some agencies that range from 39.00 euros to download 12 pictures a year when needed and up to 179.00 euros equally to download 60 pictures a year if need be, we must bear in mind that some of these subscriptions can be limited to one type of license is often the Stand.

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| New | System photo by SMS:

Photodescarga.com is a new site with a modest and very limited number of images, but with the peculiarity that can be downloaded with no obligation to register, simply send an SMS, no subscriptions and no need to purchase a minimum of credits.

The cost of each picture is 1.50 euros (price of the message in Spain). (See other Country). Although currently have a small portfolio worth in and view the photos available. For ease of use is a site to consider.