Re: How are regal boats compared to bayliner?
I owned a 2100LSR, the bowrider version of the LSC you are looking at. They have a deep-V with 24 degrees of deadrise, but are fairly light for their size. I'm guessing there might not be a huge difference between the Regal and the Bayliner.
Build quality on the Regal of that vintage is OK to slightly better than average. Being a 99, I'm guessing it has a carpeted cockpit. I having owned two boats with carpet cockpits and one with a full fiberglass-lined cockpit (my current Regal 2550LSC), I would never own another boat with a carpeted cockpit.
Keep an eye out for a Sea Ray 215 Weekender of the same vintage. They are superior to the 2150LSC, IMO. They ride nicely too.