Boy, I wish I was looking at the same ebay you've been looking at. Four bladed easels, especially Saunders easels, have been going for $150 and up. I just gave up on them and bought a two blade 16x20 Saunders easel for about $50. I'll use it only for that size and use my 11x14 four blade easels (one came free with the LPL enlarger that was on sale at B&H) for everything else.
There is, however, a four blade easel from Adorama which is also sold by Midwest Photo Exchange that's about $169 new, but I couldn't quite see how it worked and decided to go with what I bought instead.