I sold a pair of inscribable max gold r9 Salient Daggers with 5-10k worth of attached mods (depending on how you PC dagger mods) last Dec. for 30k via gwa, another trading fansite with an auction system. It didn't take long.
I haven't focused enough on them to know for sure if I sold too cheap or just got lucky, but I have the impression from years ago that they're a popular skin due to the size and dye effects. I don't think the price I asked was all that unreasonable, and obviously the guy who happily bought them didn't either.
I got them in a batch of unids I bought for the standard 7 unids for 5k rate. So clearly they're not something that everyone thinks is worth the trouble to sell.