how do i Email a list to another prim correctly

I'm trying to make my own little networked vendor system. i have everything intact and it all works perfectly except 1 minor thing. When i attempt to email the items/prices list from the notecard in the server prim to the script in the vendor prim, the vendor receives all the information incorrectly like this [ ObjectAObjectBObjectC ]. The vendors hover text shows that instead of ObjectA. How do i separate the list items? i have searched the forums and found no results for it. I know it can be done or their wouldn't be so many networked vendor systems already. I prefer to make my own though. Heres what i have...

SERVER: llEmail(vendorkey+mail, (string)items, (string)prices);

VENDOR:
email(string time, string address, string subject, string message, integer num_left)
{
string user = llDeleteSubString(message, 0, llSubStringIndex(message, "\n\n" + 1);
items = (list)subject;
prices = (list)user;
state run_store;
}

So changing a list to a string is un reversible on the other end? Or is there a different way to send it?

Trying looking up llDumpList2String and llParseString2List.

You dump your list with some separator - ^ or | are common ones, then send that string, then reconstitute the list at the other end by parsing the string to list.

wow thx I didnt know those lines existed.