I've liked some relatively inexpensive basses, especially a DiPinto Belvedere, but all my current basses are mid-level US-built instruments in a relatively narrow price range. I bought all of them new.
The least expensive was my 2007 G&L SB-2, for which I paid $700 and a "player condition" 1981 Ibanez Studio guitar. I couldn't stand that guitar, and almost felt like I stole the SB-2 at that price.
The most expensive was my special order G&L JB, for which I paid $1,525 in 2010. In retrospect that seems like a high price, but it had a couple of options including a painted headstock, and I got lucky with a quartersawn neck at no extra cost. Other than the weight it's comparable to boutiques IMO, so there's no question it was worth the money.