I know this topic has been beaten to death, but I couldn't find any threads that mentioned basses under the $750 price point. Presumably that's because it's just hard to find a good low B on a "cheaper" bass, but let me know what y'all think.
Lakland Skylines have a great B, the best I've tried. The 55-01 is less than $750 new, and you should be able to get a 55-02 used for $750. The B on the Skylines is as good as on the American made Laklands. I've never played a MTD Kingston, but I've heard they also have a very good B string, and cost less than $750. Both the Lakland and MTD have a 35" scale length, which is why the B string is so good.
The Kingston does have a great low B; tapered-end strings will really ring out. The Yamaha RBX775 also has a 35" scale.
You can find used Fender Roscoe Beck V under your price-limit. It is told to have excelent low B. Also Warwick Corvette V would be nice. Och, if you purchase Fender, I would be jealous! That is my dream bass! Good luck Ogar
Another bass to add to those already mentioned is the StingRay 5, generally can be found 2nd hand in the $700 to $800 price range. 34" scale and Excellent B string sound! [No, mine is not for sale.]
Excellent B on the Lakland 55-01 and 55-02. If you can find the 55-01 with a USA preamp (not the MK-1) that's a bonus. All the 55-02's have the USA preamp. I've had a used 55-01 Deluxe w/USA preamp that was $700, and a 55-02 Std that was $750. Stingray 5's are an excellent all around bass with a great B. I've had three from $740-825 used. Two other nice basses for easy money are the MTD Beast and Grendel. I'm pretty sure the bassline on Adrian's Access Bass web site is a Grendel if I remember correctly. As others mentioned, the MTD Kingston and Heir can hold their own in the $400-500 or so price range. Don't get too hung up on 34" vs. 35". The Stingray 5 has a great B and is a 34" scale, better than many 35" scale basses out there.
Here are some related products that TB members are talking about. Clicking on a product will take you to TB’s partner, Primary, where you can find links to TB discussions about these products. Browser not compatible