Yesterday evening, I found a copy of the 広辞苑, 5th edition, on ebay for cheap. I made an offer on it, and won it for $11, shipping included. A fantastic deal! There are a few 4th editions on amazon for a little more than that, some 5th editions for about $40, and then sixth editions are $270 and up. There's a 7th edition on ebay for about $200, too. So, getting a 5th edition in excellent condition with its slipcase for only $11 is a steal. I'll not be able to make much use of it, at first, I'm sure, but eventually it should prove a valuable addition to my learning materials.