Any ideas on avionics / instrument shops that give good credit for cores?

I used to have some info on a good business for core trade-ins, but a bout of computer cuddies erased a bunch of e-mails.

I have a few vacuum and a couple electric cores that are re-buildable. and I need to buy some new panel gear.

Anyone know of a good shop for trade-in credit?

I doubt very many shops are gonna give you much for cores, even as trade-ins.
They'd have to clean them up & check them over (if not OH them) before sale,
otherwise take the chance on them crapping out & either
1) pissing off a customer, or
2) and still have to make at least a few bucks on the deal.
IMHO you're better off selling them on Barnstormers, ebay, or craigslist--
or an aviation forum like this one.

To be honest Alex it would cost more to ship them than they are worth. I had a brand new solid state encoding transponder in the original box which I offered for "make an offer". I couldn't even get the offer of shipping costs so gave it to a local radio shop for his antique collection. I had over $1000 invested in it.