Regarding the original question:
From the following choices, which one is the most economical and user friendly:-
1.) paypal
2.) setting up your own merchant account
2.) using other systems such as oscommerce etc.
As stated above, you need a merchant account for oscommerce code. Between PayPal and merchant accounts the general consensus is that you will be better off using a merchant account if your income is over $1000.
However, my calculations, using the Maculator that I designed, indicate that PayPal may be cheaper even with sales volumes much larger than $1000 a month. Even at $5,000 a month PayPal could be cheaper than a merchant account with a discount rate of 2.39%, for example.
You can visit the Maculator at
and enter any monthly volume to compare PayPal and many other 3rd party processors against a number of merchant account offers.
Your decision should also take into consideration other factors in addition to price. Once you determine the actual cost factors, you can evaluate the pros and cons of each option based on what is best for your business, even though the processing costs may be higher.
RayCruzer
Compare monthly costs of merchant accounts and 3rd party processors with the Maculator: