is it save to submit my credit card number for payment?
well, some sites have been verified as secure sites, like ebay, amazon,… just take a look, and see if they’ve mentioned that their site is secure.
anyway, don’t be too stupid to belive what they say, check their responsible site as well.
also, you can check whether they’re stealing your info or not, if you have Explorer 7.0 and turned on the phishing check.
as a general rule, websites are not secure, unless they prove it.
hope this helps.