New Jersey’s recreational weed market opens Thursday, so naturally many first-time buyers want to know how expensive a visit to their local dispensary may be. While a few alternative treatment centers — the approved stores selling weed — are initially discounting some of their inventory, the cost to buy weed varies greatly. Prices for any one item depend on which type of weed product you want and how much you want of it. We reviewed the websites of the majority of dispensaries that will open this week. Here’s what we found: Cured flower is available in two sizes: 3.5 grams and 7 grams. A quart…