Between all the HASLs with lots of counters, and good quality third party counters, I don’t buy second copies of anything. I rotate out worn counters, and replace them with new ones in the trays.
When official maps wear out, I order another copy. The TPP ones don’t get used enough to wear out. (Maybe the HoB / BFP hill double wide, but I did get High Ground 2, for the additional maps and scenarios.)
So, I guess my rule is, unless there is something new in a product, AND I want it, I don’t buy it.