I've only done one new one and that was the recent ST#7317 costing $2.84. Did it check out the new Champ slit design that many said were ALL closed. That was for my curiosity over a filter I'd likely not be using, but wasn't expensive to check.
Other folks that do it with more expensive filters, take one for the Bitog team/oil filter board. Remember one comparing the then new Bosch Distance Plus to a P1, it was hard to tell the difference by just looking at the media. Generous folks.
By somewhat thrifty ie., tight, I prefer to wait until after I've used them to post.