This isn't an altcoin forum.
While true (it [is] BITCOINtalk.org, after all), there are also altcoin subsections - specifically relevant:
Bitcoin Forum > Other >
Alternate cryptocurrencies >
Marketplace (Altcoins)So:
Hmm...are you suggesting those threads should be moved to the altcoin marketplace section?
I certainly would suggest that
Moderating the marketplace sections is probably a challenge rife with people complaining if you do move things, though
As far as splitting goes, it might be a good idea. People looking to buy mining hardware for (relatively) cheap probably have better things to do than sifting through posts about questionable Apple hardware, graphics cards (usually posted under the suggestion of being used as mining hardware - and so should be in the altcoin marketplace), and vice versa.
On the other hand, if your post doesn't get noticed now, it's probably unlikely to get noticed then. Start with decent subject composition (e.g. "[WTB|WTS] ITEM NAME - LOCATION, PRICE") so that people don't have to click on e.g. "Selling my rig" just to find out exactly what the 'rig' is, how much it costs, and take a stab at shipping prices - and are more likely to find it in a search (forum or google), too.
E.g. from:
Coolermaster QuickFire Stealth Mechanical Keyboard (Cherry MX Brown)(Tenkeyless)To:
[WTS] Coolermaster QuickFire Stealth (MX Brown, Tenkeyless) - US, BTC0.125