He wasn't "rare" here but he sold... Steadily. Far better than Yarna, and Naboo Guard guys. IIRC TRU had the most Wilrows I ever saw, but never saw them between sales and such.
I never saw rows of them though, ever. Almost every wave of Legacy stuff was a steady seller, did ok... Not much lingered endlessly for my neck of the woods. It's like everything else. If one area got too much, it doomed other waves.