The hard-to-find parts and impossible retrofits other sellers turn away are the ones I like best. Somebody's got a fixture nobody will help them match, a part no store will identify, a retrofit everyone told them was impossible, and they end up here because I'll actually take it on. That help is part of the job, and I think it's part of why people come back.
Here's the kind of thing I mean. Someone has an old fixture missing one specific piece, and every place they've asked has said they can't help, because there's no catalog to look it up in and no easy answer. That's exactly the problem I'm built for. Send me a photo and a measurement and I can usually tell you what the part is, what era and maker it likely came from, and whether I can match it or find one. Or somebody wants to put a modern bulb behind vintage glass without wrecking the look, or fit a shade to a fixture that wasn't made for it, or get an old lamp safely working again when the parts don't match up. Those are matching and retrofit puzzles, and they take someone willing to work the problem instead of saying "we don't carry that." A general seller can only sell you what's on the shelf. Somebody who's handled thousands of these can identify the unidentifiable and figure out the retrofit that seemed impossible, because the knowledge is the product, not just the inventory.
Salvager's Note: Told nobody can help? Send a clear photo, a measurement, and what you're trying to do. A specialist can often identify an uncataloged part and figure out a retrofit that a general seller, working only from a shelf, will turn away.