Lol I was like WTF you paid $5,000 for that thing! I went back after looking at your pic and read it again and then seen only $500. Looks like you got a good deal. I'm not a truck type of guy though so yea.
That looks in great shape.Now a days a five hundred dollar vehile is one that you tow home and put a grand into to get running.The only thing to watch out for on those is if the front of the engine gets a little noisey there are tin guides for the timing chain that become loose and drop down and hit the chain .A little time consuming to fix but parts are cheap.