Clothing (including shoes) is a big one for me. It is so hard to find stuff that fits at a price I am willing to pay.
And cars. Our 2009 is looking sad: it was parked under a tree that the birds liked for a few years at a condo, the fabric on the doors is worn, DH holds the steering wheel in a way that wears through it, as well, somehow bypassing the cover...but it runs great! And I know it.
The scrubbies we use for dishes is another. For most of my life, I had access to the crocheted ones my aunt made. I finally finished of mine and the whole family 's a decade after her passing. After a few fits and starts, we found something else we like, that is available in just about every grocery store, but we throw out the old at the last second and I always stop to think of Aunt Charlotte.