I had a Nash PB-57 as I mentioned in a previous post. It was a very good player (Lollar PU) but the finish was so bad that I had it professionally refinished and properly reliced before I eventually traded it away. I bought it new from an online retailer. It looked good in the pictures on their website. When i received it, I was horrified, the color (allegedly Fiesta Red) was WAY off and appeared to have been badly applied with an aerosol can.
As others have mentioned they are basically "parts basses" (and guitars) that were factory assembled by Nash. After my less than stellar experience, I would never buy another Nash sight-unseen - some of them look really good, some do not. Yesterday I was at a local music store that is also a Nash dealer. There were a couple Strats on he wall that looked great (for a relic) but there were others that were so-so. The relicing on the newer ones evidently has vastly improved. Many of the earlier ones looked like they had been thrown off a 4 story building and then dragged behind a pickup truck on a potholed asphalt highway.
My point is, it is a very good idea to see your Nash in person before you buy it. Most of the complaints I've read have to do with the cosmetics, not the playability. In my opinion, for a parts instrument, they are very expensive. If a Nash floats your boat for nearly 2 grand, go for it. They are good players but there are clean used vintage reissue "real" Fenders out there for less $$$.