I stopped buying boxes a while back too. Like everyone else I regretted it after I got stuff I didn't want. I wish we could trade with others. I had nbrs who wanted what I got and I wanted what they had (and didn't want). Everyone wants something different. I think if there was some way to actually get what we want I'd be willing to buy them again.
I've never even dreamed of getting a rare item. But there have been some 3rd and 4th place items I'd wanted but still couldn't get them. So no more.