Take the time to be very clear in your thread title (since the bulk of the traders, I assume, aren't subscribers).
Be clear, concise, yet within those bounds give as much information as you can (reasonably).
Stick to some standards like
WTF or WTT - Want to trade for / trade
WTB - Want to buy
FS - For Sale
FT - For Trade
If something is for pickup only or you're looking to buy in a particular area, include that as well.
Brainstorm: Start including three-letter abbreviations in the title. For instance:
FS/FT: VID Geforce2 MX, HDD 160gb Maxtor, CAS Lian Li PC60, ODD Rabid Weasel
VID: Video card
HDD: Hard Drive
CAS: Case
FAN: Fan
ODD: Oddity
KB: Keyboard
MOU: Mouse
SPK: Speakers
SND: Sound card
CAR: Automobile stuff
MISC: Miscellaney
ACC: Accessories
CDR: CD-Rom, CDRW, maybe blank media as well.
DVDR: DVD-R/+R/etc drives
SOF: Software
HW: Hardware
Blah blah, I dunno
So someone wants a video card. Have search for "FS" and "VID" or somethin.
If any sort of standards can be adopted (either in full or in part), searching the forum will become more productive and bumps to the front page will become gradually less important.