Märklin H0 - Serie 5100/5200 e.a. - Model train tracks (128) - M rails

Nice parts in good condition. So no bends in the rails, for example. Also no paint splatters or the like. Well, as seen in the photos, some are a bit lighter, others a bit darker in color. I’m not sure if that is discoloration of the entire pieces of rail. But mainly see the photos

It concerns:
41 x track in a curve
10 x track in a curve with metal middle piece
16 x straight track with metal middle piece
14 straight
45 x track in a large curve
2 switches

All made in Western Germany. Neat condition, but obviously used. Attachments are almost all straight, not bent. See the photos