Those pipes are from the 580 if one of them has the metal ring on the end.
I happened on the only PB500 I've ever seen and it was a display. It was missing, air filter, spark plug, filter cover, gas cover, tubes, everything. The carb was still on so that was good. No sku or label attached so no way to ring it up on sco.
Talked to two mgrs in the area, showed them it was the old model and offered to buy it. They looked baffled for 5 seconds and said lets see what the last price was. 80.03 I thought. She said she could do that price. I was going to ask for 50% off since everything was gone but didn't want to deal with the hassle with Echo. So we walked back over and I unboxed the 580 to put on the shelve and said hey is it ok if I take what is missing off this one and put it one mine. Said I looked for the box for it but couldn't find it. She said we just throw all those away and said sure. So she watched me molest the 580 and rip everything off. I don't even know if the filter cover and filter fit the 500. I hope they do. Don't know if the pipes fit either but they have that metal ring attached to the pipe with Echo on it. The old 500 model did not have that ring. At least the pipes I saw in a 500 box weeks ago.
I had the sku but I'm sure when I said here is the sku and it rang a penny it would be no good. HD backs up stores for not selling display models.
No problems at checkout. 
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