Sent a bunch of pieces in, got there on Friday, and posted to their site over the weekend.
Just had my first piece sell on Monday morning. Looking forward to getting paid!
Edited to add: Link to the piece that just sold, since inquiring minds need to know:
https://bid.collectrea.com/marketplace/741
And apparently they do electronic payments now. My first time printing a check and then depositing it electronically. What could go wrong!?