I purchased a new bare nex gen seven years ago. I replaced the seals two years ago. I like the suit. It is pretty basic, rear entry, but I use it for diving in AK, Michigan, BC and have had absolutely no problems with it. I upgraded to dry gloves with a snap docking ring some time ago and had suspenders put in when I had the seals replaced. Depending on the water temp you dive in, the undergarment that ships with the suit may not be sufficient. I would buy another.
As a general rule, I would not buy a used drysuit or wetsuit for my use, but then I put a lot of dives on the suit.
Check around the web it you are going to buy a nex gen as I have seen prices vary widely. I don't know anything about Leisure Pro. The price your LDS is charging seems in line with other LDS prices I have seen for the suit.
If I buy another suit, it will probably be a next gen.