139 karma · joined September 18, 2008
As Aaroneous mentioned- Paypal Website Payments Pro allows you to process paypal payments and credit card charges invisibly in the background (there is no redirect to Paypal).
The processing fees/cost economics of establishing a merchant account/processor definitely make sense however once you're processing several $k/month.
For most part, I find that ideas are essentially worth the paper that they're scribbled on. It almost always comes down to execution. Go for it! You'll never know until you try, otherwise you'll always be saddled with the shoulda, coulda, wouldas(particularly if that startup competitor ends up exiting in a big way down the road). I learned my lesson the hard way.
Remember, sometimes its better to be a fast follower (and faster at reiterations) than a first mover.
Also, I'd assume that you're integrating the APIs through ActiveMerchant? I'd definitely use that regardless of which reseller/merchant provider you choose.