I have one...hadn't really thought about selling it, but I'd entertain the notion, at least. Send me a message if you'd like.
Mine's a BA (2010 built), and chambered in .40, as you're wanting.
I think I've put maybe 150 rounds through it. Bought it from an individual back in 2012, not long after I bought my first PPQ. It was a great day, I also bought (traded, rather) for my P22 at the same time from another guy.
I'll get some pics if you'd like..
EDIT, i find it funny that on that first ad that IAOF posted, the seller lists that QA as having a DA/SA trigger! LOL, numbnuts, the QA is NOT either of those, technically speaking.