admin answers:

The basic fees:

One time fees (setup/application fees, usually waived by merchant account providers)
Recurring monthly fees (statement fees)
Transaction related fees(discount rate, per transaction fees, or total orders fees)

you might want to try pay pal first (reliable as ever), or check out http://www.freemerchantaccount.biz for free stuff with your merchant account, and low rates.

Merchant account providers charge a variety of fees, depending on features included with your chosen provider. Its better to check out first their offer sheet carefully before signing up, lest you get a multitude of fees you didn’t sign up for.