hi,

anyone knows where i can get a php script to process orders for my reselling business?

i dont want to use credit cards, only bank deposit is the mode of payment

You might want to look at http://www.nixt.org/ simple free script. Open source and highly customizable.

www.phpcoin.com ,
it is very extensive and does the job of the big fish,
it does take some tinkering to get the hang of but does everything that you possibly would need, and if you are not big into creating a website, it can be used as your website, with an easy content management build right in.
has your email templates, helpdesk, faq everything all in a neat package, all for free!