I do not sign.
Like honestly, the prices are fair enough... If you want a WB gun, you can either buy an 11 piece for 2900AP or trade something for it for 3000AP... 3000ap for guaranteed(if theres no scam), but no SP awarded or game items compared to 2900ap for an 11 piece wb that MIGHT let you win it, while you get SP and game items along with it... It's really a fair price/deal.
Everyone would do trades if the weap transfer price was lowered... That means hardly people would buy WB. Think about the business and money you need to make if YOU were in charge of SF, especially when you need to pay the GM's salaries, utility bills in the HQ, and many more.