Need more int, dex, or str, but already at your stat cap? Then have I got a deal for you! This power scroll will bump your stat cap to 320 (assuming you haven't already used a higher level one, of course).
But at what price? A relatively reasonable 2 million gold or your best offer! Consider this: you can get a +25 for 300 ED, and a +50 for 500 ED, so let's assume that a +20 would be worth about 200 ED based on those, and therefore 4 million gold at the absolute minimum ED exchange rate.
Of course, I know this is a great big pile of cash, so rather than just gold, I'm accepting combined forms of payment, such as both gold and ED (assuming standard ED exchange rates), or even trade-ins on certain artifacts at values to be discussed.
If you're interesting in purchasing or setting up a trade, just PM Zodart in-game, and we'll strike a deal! I'll leave the floor open for a bit to give a few people a chance to bid if they like.