W2 parts! What are they worth?

Porting terrifies me, unless it comes with a pedigree. 'Pro'? I can't help but notice that if I go to Home Depot, they expect me to take a lousy parking spot in deference to 'professionals'. That's appalling in any circumstance, but especially so when I notice a 'pro' is anyone in a 18 year old truck with 5 gallon buckets in the bed and magnetic signs on the door.

Those valve guides looks a little sketchy to me, for starters.

As for having the valves installed prior to selling....that's money wasted as it adds no value for a buyer. anyone buying those heads would/should want them inspected, cleaned, and assembled by his own shop with the springs/retainers that he needs, etc.