Re: Need a Jazz Bass
You’re looking at basses, not guitars. Top-load is the norm. My Ibanez Mikro, Warwick Corvette, Squier P, and Yamaha P/J are all top-load.
One of the big advantages, especially if it has a tailpiece/bridge like a Warwick, is you can take strings on and off without screwing up the wraps and breaking them. It’s pretty common for bass players to swap strings around. Over on TalkBass, tons of people buy and sell gently used strings.