I write this because the OP is making a genuine effort to do decent threads on here. Hang Dong, there's plenty around the Bantawai area. People buy container loads of second-hand Japanese stuff and bring them over to sell. Clothes, kitchen gear, knick-knacks, toys, the works.
Have they recently increased pricing in the actual airport lot?
I recommended it to someone recently only to have them complain it was 500 overnight? I think I was paying 1-200?