I have too. I don't think I got the best price for it but it was an easy way to sell it. They were easy to deal with and got back to my emails quickly.
I'm sorry I can't remember how long it took for them to pay me. I don't think it can have been too long as I don't remember worrying about it (and I am a worrier!)
I'm having the same trouble at the moment, i have a lovely VSD saddle for sale, it is currently with the saddler to sell but no luck so far. Have also tried ebay but it only got up to 150 quid! Its worth 600 and I only want 400 for it, but still no one wants it!