I've been trawling through the community boards for about a month. I usually can find the answer by drilling down on my searches. However, this one has me stumped, as I guess it may be a bit specific.
I need to prevent customers from adding more than 2 of any one item, if its of a specific type. We run a comic book shop, and speculators are ruining it for our regular customers, so I'd like to prevent them from swooping in and clearing us out of hot books before others have a chance to enjoy them. This is only an issue with comics. Not any of the other product types.
There has to be a code solution for this. I'm not amazing at coding, but I've managed to fix the site every time I've broken it.