My comments/suggestions:
- At least just under the "Year and Manufacturer" category, go auctions only! This is a must as eBay BIN listings are a no-longer funny graveyard of overpriced cards. But when someone selects to filter results by seller, grade, or price, then it makes sense to have BIN listings too.
- Keep it to just PSA and SGC. Beyond that it is a slippery slope to who knows what graded company, and by keeping out raw cards you keep out the huge load of reprints on eBay.
- Refine the eBay filter by selecting "Cards" > "Baseball" > "Pre-WWII". For example, if you view by grade it shows 205 cards graded PSA 10. But if you filter it as Cards/Baseball/Pre-WWII, then it shows only 11 results, a big difference! It was showing all sorts of modern and non-baseball cards before the results were filtered.
Also, why are there multiple T205 categories?