This is definitely a pitfall of the MP, but some people learn to love it. I think a lot of the disorganization originates with lazy sellers who don't want to make a new thread each time they sell something. I have learned to ignore posts that clearly have been active for a long time (# of views is a good hint) simply because I assume I already looked at the thread and didn't want anything. I don't care if you put something like, "Check back often" or "Updated often" in your title. It's stupid.
Because its a super cluttered disorganized mess. I don't want to have to sift through 200 threads to find something I would perhaps want, or have to continually bump my own thread to keep it from dropping an entire page every hour. Even Craigslist has some modicum of a search to help sort things out.
Searching is very simple. If you want a disc, type the name in the search and browse threads that it's mentioned it.
This. I have frequently searched the marketplace - functionally window shopping for discs. It's not disorganized if you're looking for a specific mold. That said, I have never purchased anything from the MP and may never. Here's my reasons.
I also throw only one disc that is OOP, an SE Rhyno. I don't feel like paying what it would cost to replace one - $40-45ish and like northward at MP, and $60+ on eBay - and that is what I would see myself using the marketplace for, buying OOP discs. B/c I can't see myself replacing the one OOP disc I throw, I don't have a reason to use it. If I threw now or grew up throwing KC Pro Teebirds, etc. or 11x Eagles, CE discs, etc. then I would use it often to accumulate my stack. But I don't and I didn't. I did for a long time throw TP Cyclones, but I have moved on from those (to Eagles).
I also don't have a decent store near me (very basic Innova/Discraft offerings despite decent amount of volume of those basic models), but I research discs very thoroughly, read threads about them, and just put in my first order to Marshall Street (and the factory store, buying the new Pro Rhynos which I believe will eventually replace my SE Rhyno). I couldn't be happier with what arrived. All are in-production discs that are readily available via the interwebs. I also know that if I need something specific that is in-production, I can call MST and they'll do what they can to fill my needs. Same with Gateway if I ever fall in love with Wizards, etc.
I'm also re-learning the game, understanding how discs wear, and throw a lot of base plastic. Many of the discs on the MP are used to some degree, and that hampers my learning if I pick up something without an understanding of how much it has been used.
I think that is it. It's great to have here, but I do not have any use for it right now. I could see myself getting into 11x Teebirds, Eagles and Firebirds, and I want to throw an ESP Comet one of these days, but not now and maybe never. I just overhauled my bag, I'm set for a while.
Good topic b3nder.