I'm sure Yadaddy can attest to custom build kits pricing.
Hmmm. Well, if we're talking about a custom built AK for three grand...that same money would've bought me 3 of the AKs in my collection. Counting the cost of even a medium expensive kit: a US receiver, compliance parts and the gunsmith's building cost - $1000 is about average. Maybe if you went nuts with engraving and more build time we could get it to $1500. Not sure what they are doing for 3K. That's Krebs Custom money.
One lottery win and I'd gladly shell it out for what Krebs and others charge, but till then...