Well it's been a while since my last merchant tip, and as you can see, they're now on a new site. Anyway, the week I advise buying abyssal whips. They are down to 425k each. They have been over 1.4 mill in the past and are often over 1 mill. I am certain it is a good investment.
If you are worried it's becoming less valuable because fewer people becoming members, I'd have to say this is the best time to invest. Christmas is just around the corner and that means allot of people will be getting RuneScape membership cards in their stockings. More new members means higher prices for members items, especially weapons, and armor.
With the Christmas boost, and the low price of of abyssal whips makes them a great investment. Any time you can find an item at less than half of it's average price it is a great investment opportunity, not just when you have Christmas coming up, but Christmas just makes it better.
Thanks for reading and feel free leave a comment. You can also check out allot more of my merchant tips here, or look at some other RuneScape tips on my website at http://www.sivesthoughts.yolasite.com/runescape-merchant-tips.php