I'm thinking of setting up a site which will need secure transactions and payments.

I'm aware there are 'packages' you can buy for a yearly fee but thats about as far as i've managed to get so far.

Any advice/inside knowledge or experience of such a thing from anyone on here??

To expand i'd be mainly dealing with low monetary value transactions via creditcard/debit card with some online payment systems as well such as paypal although to a lesser extent.

So far i've come across some scary figures quoted back at me.

Example Costs

Set-up Recurring Costs Charges
Generic Acquiring † £200 £10 2 - 3.35% per credit card transaction
£0.25 - £0.35 per debit card transaction
NetBanx PSP ± £75 £10 from 4% to 1% per transaction
Worldpay‡ £200 £360 (annual) 4.5% credit cards, £0.50 debit cards

For starters 35p for a single transaction by switch couldn't be coped with without compromising the whole idea i have going.

The 2-3% per credit card transaction I could cope with for sure, but taking debit cards off would limit the market vastly.