Schoffner's Catalogue isn't a good card on its own. The reason is obvious; having to pay 2 resources, a card and a play action for 5 resources is a lousy deal. Yes, you can pay for other investigators' stuff, but the item assets-only clause is a severe limitation in a game with events, spells, allies and whatsnot. Also note that most investigators tend to play their items early-to-mid game, making Schoffner's Catalogue less relevant as the rounds pass by.
Still, it's a good card for a few investigators:
- Bob Jenkins really likes this card, as he can play it as an extra action and use it to pay for all his other items. The catalogue as an item based support package is literally designed for him.
- It's also decent for parallell Daisy Walker, as the catalog is pocket sized and requires no hand slots. And =Daisy can use it to pay for her other tomes and as a target for tome-related shenanigans.
- Recursion. The catalogue is automatically discarded when empty, making for an easy combo with Scavenging. With Scavenging (2) you can even get it in play without spending a play action.
- Tome interactions. Whitton Greene to find it, Library Docent to bump it or play it for free, etc.
- It's also a possible source for harvesting secrets (Eldritch Sophist).
All in all, a niche card that works well for Bob and possibly parallell Daisy. Other investigators will have to find ways to make the catalogue more efficient to make it worth their time - such as a support Minh with Scavenging or a Yorick build with enough costly items to make the catalogue worth using his ability on.