How much are stock cats worth?
 

So I just had my final free oil change at the dealership yesterday, and the manager called me up offering me $500 for the set of stock cats, (he noticed I'd swapped them out for test pipes). I looked on the Nissan website and the part goes for about $700, but i'm not sure if that is for the set or just one. Either way, they only had about 10,000 miles on them, and they're still in good condition. I was keeping them just in case I needed them but I could use some money; however, I'm just not sure if he's low balling by a lot. Thanks guys

Cats are actually worth a bit of money, very high stolen item. Just make two quick cuts to the exhaust and take it.
My brother had his stolen off his 94 Nissan pick up last year, dealer wanted $500 for a new one just for the part or he could buy an aftermarket HFC for $100.

They're worth a LOT if you know the right people... To me...
They're an item I sold on the forum for $50 shipped to help someone out.
And I took it in good faith that they would not resell or scrap them.

In any case, if your dealershit is paying $500/pair, sign me up, I'll send them some