I never considered the issue of crowding out other sellers, I’m coming at it from a strictly visual perspective and what it conveys. If a seller posts a 500 word essay for a title, it’s too much to wade through, especially if caps are used along with excess punctuation; the titles read like listings from those carnival barker schmucks on ebay I avoid.
I’m also more interested in who the seller is. When I see a skypinkblu, Dr.X, GACollectibles or October sales thread for example, I want to look at it and see what’s for sale. Whereas when Ryan posts, I head right back to Comics General.
I don’t need a laundry list of dozens of books in a title, just something simple, like “Atlas Pre-Code Horror,” "Silver and Bronze Marvels," "DC War," etc. is plenty.