as in the title, adding [WTA] WTS WTB and WTT will make both buyers, sellers or sometimes trader easier to look for their customers/sellers

it will be easier to search by the tag such as HDD [WTB], if I click it, then I will see the threads of people that wanting to buy an HDD

my 2 sens

its easier for ppl who want urgent sales, because that way they can look for buyers, not like the traditional way like waiting buyers to click your thread