Couldn't tell you what tips are worth these days. Except for the PTA7 tip that came in my new TC201T pencil, the youngest of my tips are 20+ years old (still got 3 of PTH7s in sealed packaging), and many of my tips date from the mid-70s.
Looking at places like
Allied Electronics, their tip prices are currently listed at USD$3.76 each.
Thanks.
It's my understanding that either buying locally or importing from the US can make things rather expensive. So I didn't know how bad the shipping and perhaps customs costs would make an otherwise inexpensive part increase in cost.
As per the quality of the tips, I was going to mention giving Plato's equivalents a try if you were having any issues. Very similar in cost (usually slightly less expensive), and seem to have better (thicker) plating than some of what's coming directly from Weller for the LT series tips. Chinese made equivalents are showing up too. Testing out a couple to see if they're worth using in the future.
No equivalents for the NT series yet (if ever), so I've no choice for these.
Not blowing through them due to good care, but they seem to require a lot of rehabbing vs. what I recall in the past. Specifically, I'm finding I have to use tip cleaner/tinning compound fairly frequently, say once every couple of months, even with proper tinning using solder wire (Kester 44 - 63/37 alloy, 66 size rosin core). So unlike Weller's tips in the past, I'm not expecting to be able to get 10+ years out of them for hobbyist use.
Irons are used in a stop-n-go stand that sets the temp back to 200F as soon as it's inserted into the stand (soldering temp is 500F - 600F, so they're not being cooked to death).
Tip COO is all over the place, but most I've had issues with are from Bosnia FWIW (primary production plant for LT series; a couple of profiles from Japan, and all of the NT series are from Japan).
May not be an issue for you, as currently the PT tips are produced in Mexico.
BTW, you might want to take a look at Tequipment.net for Weller branded PT series tips (
here). Given you seem to buy multiples, the savings might be worth it. Their warehouses are located in NY and PA, so shipping times might be a bit quicker as well.