I recently bought a Sov XS2aPro on Ebay. It was advertised as "like new, never used". I recieved it in that condition and believe it to be true. It has the Minelab 500 meter. My experience with the BBS technology is an Excaliber I used for a year on the local beaches, so I have a clue as to how the Sovereign works. I intend the Sovereign for dirt digging only, and will soon add a Sunray probe. I'm considering removal of the meter for two reasons: First, I usually get to my hunting spots via motorcycle with my equipment in a backpack and I'd like to minimize what I carry. Second, my former land machine was a Tesoro Vaquero, which was really lightweight in comparison to the Sov, so I'd like to save weight where I can. I can see the meter maybe helping me with tones as I learn the machine, but what's the consensus as to its value after I that?
You can get away without one on the beach, but while dirt fishing I found mine to be a necessity. It really helps on the deep coins as sometimes they won't sound that great, but you can watch the numbers climb.
Good luck with that, or you can take every ones advice and shorten the learning curve by 6-12 months.