I had a half day at work so I did some exploring. First stop was an estate sale a couple miles from me. The guy was a car guy, but the tools were all pretty low quality so I didn't grab much. Just got a small container of razor blades for $1 and four Craftsman WF punches/chisels for a whopping $0.15 each. They look like they've never been used. They're in such good shape I think I'd feel guilty using them.
Next stop was my favorite pawn shop. I spent about 45 minutes digging through the sockets. Here's what I ended up with. $12 for everything. Also included in the lot was a 19/32" + 11/16" Blue Point offset DBE. It's not pictured because it's taking a little de rusting bath.
Thorsen 514 1/2" drive 7/16" 12 point
Thorsen 416JX 3/8" drive 1/2" 6 point swivel
Thorsen 9M 1/4" drive 9/32 6 point
Thorsen 532 1/2" drive 1" 12 point
Wright 4120 1/2" drive 5/8" 12 point
MAC x104 3/8" drive 5/16 square
Matco A0116 1/4" drive 11/32" 6 point deep
Snap-on SFS201 3/8" drive 5/8" 6 point deep
Blackhawk GW-1607 1/4" drive 7/32" 6 point
Blackhawk GW-1612 1/4" drive 3/8" 6 point
Blackhawk 32016M 3/8" drive 16MM 6 point
Blackhawk 43012M 1/2" drive 12MM 12 point
2x Blackhawk 30618 3/8" drive 9/16" 6 point (accidentally grabbed two of the same. Up for trade if someone needs it)
Blackhawk 30018 3/8" drive 9/16" 12 point
Blackhawk 30626 3/8" drive 13/16" 6 point
Craftsman =v= 1/4" drive 7/16" 6 point
Craftsman :v: 1/4" drive 9/32 6 point
S-K Wayne 45116 3/8" drive 1/2" 6 point
S-K 40911 1/4" drive 11/32 6 point
Last stop of the day was a pawn shop I'd never been to. They had a large selection, but the guy at the counter was looking up part numbers on Ebay to price the sockets out individually when I brought a handful to the counter.

I ended up paying $15 for this bunch, which was probably overpaying. I don't know if I'll go back there. Here's the lot
Blackhawk 30022 3/8" drive 11/16" 12 point
Blackhawk 34015M 3/8" drive 15MM 12 point
Blackhawk 32011M 3/8" drive 11MM 6 point
S-K 40704 1/4 drive 6MM 6 point
S-K 316 3/8" drive 16MM 6 point
Snap-on TW161 1/2" drive 1/2" 6 point