rust on a used for sale truck

It's been a long time (way to long) since I've posted on the forum because life has taken its course.. Well with life changing for the better I am looking at buying a crew cab Tacoma to replace my access cab Tacoma before kids come along... well the one I'm looking at has rust on the lights around the license plate on the rear bumper... I might be over reacting.. it's a 2010 TRD sport white with 85k for $20,900.. suck trading up from a 2008 with 49,700k... any insight much appreciated!

 

Also I know Tacoma's are known for running forever! But would you personally go from 50k to 85k?

 

Thanks I took your word for it and am going to get an appraisal tomorrow on my truck and there is a 2012 double cab TRD sport LB for 24,000 with 60k on it and a 2012 double cab SR5 LB with 31k for 26,000! Just have to work a deal to make it more affordable for a payment