This is exactly a sawmill, not a resale. I got to them on the recommendation of the builders. There are a lot of boards available. They are sawing fresh forest (I have not seen dead wood). All the necessary sizes were available. I didn't notice any blue, black, rotten ones in the grade 1-2 shown. They have them separately, like 3-4 grades. It was delivered on the same day. The prices are reasonable. There are no complaints about the quality. For me, the main thing is not to cheat.
The boards are terrible. All different sizes. We ordered 6 m, 10.15 cm wide. As a result, the boards are random: 14.5, 16, 15.5, as necessary. The length is also 5.9, or 6.3.
There is a lot of dry forest. There are curves in different planes.