price can be as little or as much as you can afford. if you can get to any of the bike shows, j&s always have bargains, or you can go for top priced stuff new from a dealer, there's also absolutely nothing wrong with buying second hand off ebay ( apart from a lid...that needs to be new , though price is less important than fit). what you go for depends on what you're using the bike for. if its going to be your only , every day transport , in all weathers, then id recommend fully armoured textiles with a waterproof overlayer option. if you prefer the fit and feel of leather ( as I do ) then buy big enough to stick a layer or 2 under, and get a decent weatherproof over set. ( don't get leathers so big that the armour wont stay where its needed) the items to not scrimp on would be lid, boots, gloves, ( IMHO) , the rest just needs to be protective, armoured, warm enough, and comfy to ride in.