I think after shipping and fees from Argentina, the Risso piece I recently posted was my most expensive, about 1500. I'm delighted with it though, so I didn't mind paying it.
https://www.comicartfans.com/Gallery...?Piece=1523552
I've gotten three other commissions at $1000, and am happy with two of them (Ed McGuinness and Mike Allred, I highly recommend them both!). I don't want to mention the other piece, just because I think I wasn't clear enough with what I was looking for. I would definitely try again with that artist, just not anytime soon.
https://www.comicartfans.com/Gallery...?Piece=1351983
https://www.comicartfans.com/Gallery...?Piece=1351981
In the meantime, I basically limit myself to 1 big piece like that a year, if I find the artist I'm looking for and think it might be worth it. If not, I keep looking. I would go higher than Risso for a full blown piece from Arthur Adams, but I think that might be my cap, and something I save up several years for.