Need opinions on the undercarriage pictures

Hello,

I have been searching for replacement truck for my 2015 Tundra and found a truck which seem to be in good condition overall but had slight concerns about what shows from the undercarriage pictures and I would like to get people's opinion on whether any of them are a red flag or not.

Little info on truck
year: 2020
miles: 16k
trim: limited with trd off road package
Toyota certified used
asking price: 51k but open to negotiation as it is missing tonneau cover.

Attached three pictures for review and each picture has black square where I would like people's opinion on.

I would appreciate all the feedbacks!

 

It looks fine. Transfer case is just factory gasket material squeezed out. Gas tank skid just looks like debris sticking out of a drain hole. Alignment bolt just looks like grease.
It’s a little pricey but looks clean from those pics.

 

Alignment cam is either grease or a marking pen, t-case is factory gasket maker, gas tank skid is a leaf sticking out.

I wouldn't worry about any of that.