Like I mentioned: Excess Solutions in Milpitas.
There are a couple of others I visited last month:
Anchor Electronics: San Jose
Halted
Weirdstuff (Open on Sunday!!!)
Advanced Component Electronics
You have to dig for deals at ACE and Excess but it can be worth it.
Excess had 16 pin dual wipe sockets price a .05 each so I bought 10 tubes. I also bought some parts cabinets just to get the chips inside. I got a lot of old, hard to find chips then left them the parts cabinets to resell. No sense in trying to get those on an airplane home.
Anchor had great prices on old PROMs and I bought as many as I could while there. I also cleaned them out of new old stock NVRAMs (ER-2055) for old Atari arcade games. They had bags of NOS Amp dual wipe sockets in 14, 24, and 28 pins for $1.00 a bag. I bought all I could get since there were between 10 to 30 in a bag.
Weirdstuff is Wierdstuff and pricey on a lot of things but I did pick up a lot of old video and other PC cards to strip for chips that I needed. You have to dig for things there. Be prepared to spend a LOT of time.
Halted was premium pricing on used test gear but I did find some great values on chips and sockets while there. You have to look in the side room where the bulk deals are like 40 pin sockets for $1.00 a tube (12)
While there I bought Halted out of 18 pin dual wipe sockets. They had them priced at 21 for $1.
Excess had 16 pin dual wipe sockets price a .05 each so I bought 10 tubes.
Anchor had great prices on old PROMs and I bought as many as I could while there. I also cleaned them out of new old stock NVRAMs (ER-2055) for old Atari arcade games. They had bags of NOS Amp dual wipe sockets in 14, 24, and 28 pins for $1.00 a bag. I bought all I could get since there were between 10 to 30 in a bag. It's a small store so looking around won't take much time.
ACE has a LARGE amount of EPROMs. I bought them out of 2532 and most of their 1702 EPROMs. I bought a lot but couldn't make a dent in their 2708 stocks and they have most other EPROMs until you get past 8Mb then they drop off. I also bought them out of their 40 pin IDP connectors. Those are the crimp on connectors that plug into 40 pin DIP sockets. You need them to make new cables for Ms. Pac Man CPU daughter boards.
Be prepared to spend a lot of time at ACE. They have a lot of chips for sale. If you don't see what you want, ask. They keep the more expensive items in a private stock room.
I think I'm good for the short term on PROMs and NVRAMs and for the long term on sockets. :D