Hope this is the right place for this question. For years I've searched eBay for film cameras using their "type" filters such as slr, rangefinder, large format, etc.

It's been several months since I've searched in this manner, and I am unable to figure out where these filters are now kept. The filters appear under lenses, but not cameras. Can't seem to find any direction within eBay or Google searches. Any thoughts? Thanks.