I want that my custumers (not all), can order n-th quantity of products in any time interval (optionally), for example, my custumers can order only 3 products in 1 month! When the time is up, they can order 3 more products!
Is their such opportunity or maybe I need module??
make a new table that when order is submitted (go better by case update pending and balance <=1 to ensure one entry per order!!) you store the amount of the products and the user id, and the time $now + 3 monthts via php mktime.
Then when an order is created by addtocart_hook, you check if this user (guests??) has already thru products or not..
I don't understand you a little bit =(
I'm not programmer =(
doubt that there is yet a contribution doing it for you? It takes just a few lines, see the API link, adding a table to an sql db ...
Man... I don't even understand these instructions. 
dimon_td, this isn't possible and would require a custom module. Since you're not a programmer, you may consider hiring someone to do it or revising your business model.
It is urgently necessary to learn php, but I don't know where I can take a good manual =(
Hi Ryan - do you know of any improvements along this request? This thread is kinda old
My client wants the cart to work in this fashion:
They have 10 Products.
Either one of the 2 of those products can only be purchased if the visitor has NOT purchased either of those two products in the last year.
i.e. If they purchased ProdA within the last year, they can't buy ProdA again, If they bought ProdB a year and a half ago, they can buy ProdB.
The datd for the users is being ported over from I think OSCommerce, so we'll be putting together a database that either fit's into the UberCart DB or some kind of bridge with maybe Cron running some of the data transfer . . .. not sure.
If there are any new developments tho in the Ubercart module for drupal that might help, passing them on would be greatly appreciated.
-J
