Yes that is an old processor. Since I have IT backbround I go by age groups of
what Operating systems it was part of (95,98,2000 and XP) and that tells me
more or less when it stands to if I put it in the new CPU or older group.
Many times the older groups of processor has a better value. If you know that it is an
advantage to who will pay you more.
When I started 6mths ago I had not research or contacts on metals so I took it to whoever. Now, with more contacts and research I can get over $20lb on older CPU's an but usually they give you up to $10lb. You will get more once you build your contacts with recyclers in your area.

Keep on looking because the more the marrier. It really boils down to volume and separating everything with more or less value.