Yeah, the Rosenthal Pottery is great. I have one of their pleco caves and the veggie weight. I didn't really look at the prices on there, but I think prices the have on Aquabid are very reasonable.
The pleco cave I got was 4.99 with a bonus veggie weight. I forget how much shipping was, but I think the total was between $10 and $12. Everything looked great and the packing material was great. My plecos love it! I'm sure their discus things are great too. Everything I've seen looks quite nice.