Does this Cassette and Jockey Wheels need to be changed?

TIme has come to change the chain after 7,496.9 KM. Chain is starting to slip gears.

I was using Sram PC1051 on my 10 speed 52/39 & 11/25 cassette.

I will probably get the Ultegra 6701 to see how that compares to the Sram pc1051. Not decided yet.

Altough my real question is… Once I’m changing the chain, I was considering to change also the cassette.

For the pictures below do you think that either/or the cassette and the Jockey wheels need to be changed?

https://www.instagram.com/p/BiC4IPaj1x0/?hl=en&taken-by=guinom8

I know I could easly bring to the shop but I would like to know these things myself and maintain my bikes myself.

Would you belive the local bike shop wanted to charge me 35 euro to change cassettes from one brand new wheel to another brand new wheel? I bought the tools for 28 euro and changed it myself..

All commend and feedback more than appreciate.

Thank you.