Here it is, it's totally untested and not supported by me because it's mostly copypaste from Nightbox's Loyal Plugin so all credits belong to him.
To use it put a new entry in your buymenu.txt similar to this:
Code:
"4"
{
"title" "1 week reserved slot"
"price" "600"
"oncmd" "sm_addtimedreserved @ 604800"
"offcmd" ""
"time" "0"
}
"5"
{
"title" "2 weeks reserved slot"
"price" "1000"
"oncmd" "sm_addtimedreserved @ 1209600"
"offcmd" ""
"time" "0"
}
Instead of 4 and 5 as id use something that is not yet used.