Just received my gravel frame from Waltly. I went with their standard gravel frame instead of custom, funnily their standard frame was incredibly similar to another Ti brand on the market.
I paid USD $1,150 plus shipping (inc frame, carbon forks, FSA headset and Ti seatpost). I've had it for a couple of months and very happy. The frame, services, etc was all very good, recommended based on my experience and what I heard from others.
Only two design options I would change. I'd request a setback seatpost because my bike setup means my seat is quite far back. Also, I should have gone with their T47 BB (their standard design), I opted for BSA because I already had a BB to fit, however, I think the T47 would have given more space for a dropper post cable and wireless if I go that way in future.